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More than meets the eye: The functional
components underlying influencer
marketing
Colin Campbell
a,b
, Justine Rapp Farrell
a,
*
a
School of Business, University of San Diego, 5998 Alcala Park, San Diego, CA 92101,
U.S.A.
b
Swinburne University of Technology, Hawthorn, VIC 3122, Australia
KEYWORDS
Influencers;
Influencer marketing;
Social media marketing;
Marketing campaign;
Online advertising;
Product endorsement;
Native advertising
Abstract Influencer marketing is the practice of compensating individuals for
posting about a product or service on social media. Influencer marketing is on
the rise, and many marketers now plan either to start using influencers or to
increase their use of them in their media mixes. Despite such growth, relatively
little strategic or academic insight exists that is specific to influencers. In this
article, we describe the roots of influencer marketing and the many different
types of influencers that now exist. We identify influencers’ three functional
components: the audience, the endorser, and the social media manager. We then
detail for each of these components the different sources of value influencers
potentially offer marketers. We draw on relevant academic research to offer
advice about how to leverage each component strategically. We close by
describing how the interplay of these functional components makes influencers
a potentially powerfuldand undervalueddmarketing tool.
ª2020 Kelley School of Business, Indiana University. Published by Elsevier Inc. All
rights reserved.
1. Influencer marketing
Once a small movement, influencer marketing is
estimated to become a $101 billion industry in
2020, with 75% of advertisers reporting using
influencers and 43% expecting to increase their
spending on influencers in the next year
(Association of National Advertisers, 2018). While
brands often struggle to create engaging social
media content, influencers are specialists at
generating content consumers interact with,
which helps it spread more widely on social media.
In exchange for their ability to garner such reach,
top influencers can command over six figures for a
single social media post and in aggregate can earn
millions per year (McCoole, 2018). This has led to
* Corresponding author
E-mail addresses: colincampbell@sandiego.edu (C. Campbell),
justinefarrell@sandiego.edu (J.R. Farrell)
https://doi.org/10.1016/j.bushor.2020.03.003
0007-6813/ª2020 Kelley School of Business, Indiana University. Published by Elsevier Inc. All rights reserved.
Business Horizons (xxxx) xxx, xxx
Available online at www.sciencedirect.com
ScienceDirect
www.journals.elsevier.com/business-horizons
an influx of people into the field, particularly
young people who consider it an easy and lucrative
summer job (Lorenz, 2018). Growth in influencer
marketing is also leading to the rise of ad agencies,
clearinghouses, and talent agents specialized in
the industry, with one review
1
finding nearly 1,300
influencer agencies alone.
While the Interactive Advertising Bureau (IAB)
recently released a detailed operational guide on
influencer marketing, featuring a multitude of
case studies from major brands (IAB, 2018), rela-
tively little strategic or academic insight is avail-
able for marketers looking to better understand
and capitalize on this new tool. In this article, we
explore the opportunities possible through influ-
encers by examining their three core advertising
functionalities: the audience, the endorser, and
the social media manager. By examining these
components first individually and then collec-
tively, we show how marketers can best harness
influencers in their campaigns.
2. The rise of influencers
An influencer is someone who posts to social media
in exchange for compensation (Campbell & Grimm,
2019). Influencers can post to any social media
platform, though Instagram and Facebook are the
most popular (Association of National Advertisers,
2018). Companies compensate influencers either
with money or in kind, such as with free products,
services, trips, or experiences.
Influencers’ advertisements appear online and
typically blend into their environment by matching
the format of surrounding content, similar to an
advertorial or infomercial (Campbell & Grimm,
2019). The recent growth of influencer marketing
can be attributed to the intersection of several
different forces. First, consumers have shifted
their media consumption from print to online
media. Second, consumers react differently to
advertising when they are online. When online,
consumers are known to be goal-directed, which
makes them more averse to overt advertisements
(Cho & Cheon, 2004). This makes advertising in
online environments difficult and has led to the
use of softer, less overt, and more authentic
advertising approaches (Association of National
Advertisers, 2018; Campbell & Grimm, 2019).
Third, consumers spend a large proportion of their
time online on social media, a fact not exclusive to
millennials (Gajanan, 2017). Unlike print media,
social media platforms like Instagram and YouTube
are open forums where consumers compete to
garner audiences. Consumers field-test their con-
tent against the live responses of fellow con-
sumers, resulting in the emergence of talent that
is highly compelling and often seen as more
authentic than brand-created content. Fourth,
social media extends the consideration and eval-
uation stages in consumer decision making
(Lindsey-Mullikin & Borin, 2017), requiring lighter
but more frequent exposure to information on
products and brands. Finally, the internet enables
easy aggregation of consumers based on shared
interests. This facilitates the emergence of influ-
encers who appeal to relatively niche, long-tail
audiences.
All of these forces combined are driving rapid
change in the advertising industry, as many
agencies are not set up to build digital experiences
for consumers who spend more and more time
online (Mallia & Windels, 2011). Marketing on so-
cial media carries with it the expectation of 24/7
engagement and response, as well as the need for
a fluid marketing structure that is nimble and dy-
namic in reacting to consumer response patterns
and trending topics. As such, some marketers are
shifting some control out of the agency and into
the hands of influencers, leveraging their skill sets
and close connections to the target audience. This
has created a rapidly expanding, increasingly
powerful group of influencers and constitutes a
prominent shift in online marketing.
3. The scope of influencers is expanding:
From nanoinfluencers to celebrity
influencers
Influencer marketing is a large and expanding
phenomenon. Upfluence
2
reports their database
spans 1.2 million influencers across 250 categories,
while Captiv8
3
and Mavrck
4
report over 1 million
and 2 million influencers in their respective data-
bases. Even assuming some overlap in these data-
bases, these numbers are impressive. Influencers
are often associated with millennials in categories
such as clothing, cosmetics, and luxury travel, but
they are also emerging across a wide variety of
ages and product categories. This includes the
elderly, such as Iris Apfel (@iris.apfel) at 97 years
of age; those in midlife, such as Jessica Gottlieb
and Stefanie Pollard (@wearemidlife); and even
1
https://clutch.co/agencies/social-media-marketing/
influencer
2
https://search.upfluence.com
3
https://captiv8.io/marketplace/index.html
4
https://www.mavrck.co/how-mavrck-is-different/
2 C. Campbell, J.R. Farrell
unborn babies, such as Halston Blake Fisher
(@halston.blake). Influencer marketing is also
expanding into pets, such as Loki the Wolfdog
(@Loki), as well as AI-generated influencer ac-
counts, such as Lil Miquela (@lilmiquela). Influ-
encers appear able to form around any topic for
which a consumer audience exists.
Perhaps the most interesting and dynamic
element to influencer marketing is the notably
wide range of characteristics among the available
talent. Influencers differ significantly in branding
and focus, follower base, engagement rates,
monetary requirements for collaboration, and
skill setsdall of which compose the package the
influencer is able to offer a brand. Given these
differences, we draw from a variety of sources to
develop the five distinct influencer categories
shown in Figure 1. These categories are based not
only on follower counts but also perceived
authenticity, accessibility, expertise, and cultural
capital. We note important distinctions between
categories, incorporating insights from industry
sources (Association of National Advertisers,
2018; Launchmetrics, 2018) to define influencers
within five distinct categories: celebrity influ-
encers, megainfluencers, macroinfluencers,
microinfluencers, and nanoinfluencers.
3.1. Celebrity influencers
A celebrity influencer is any individual who enjoys
public recognition outside of social media and is
leveraged by brands for their large follower base.
Celebrity influencers such as Selena Gomez, Paris
Hilton, and Kim Kardashian experienced fame and
notoriety prior to or independent from the evo-
lution of social media, though they now use their
social media presences to support their careers
and propagate brand partnerships. These influ-
encers often have over 1 million followers and
major endorsement deals with well-known
brands. Celebrity influencers frequently work
with brands associated with their prior work
(e.g., music or film), and this cultural capital lets
them command significantly higher price tags
than other, noncelebrity influencers. Though they
tend to form weak brand connections, celebrity
influencers can carry high levels of perceived
expertise, which is another factor behind their
high pay. Despite their relatively low engagement
rates overall, celebrity influencers are infamously
known to charge over $250,000 per Instagram post
(Chen, 2017).
3.2. Megainfluencers
Like celebrity influencers, megainfluencers are
individuals who have experienced significant fol-
lower growth on social media and who have
created a celebrity status from an established
expertise, having attained 1 million or more fol-
lowers. But unlike celebrity influencers, megain-
fluencers, such as Zoe
¨Sugg (@zoesugg) and Josh
Ostrovsky (@thefatjewish), are people who lacked
celebrity status prior to their becoming social
media mavens. While they may be “internet
Figure 1. Types of social media influencers
The functional components underlying influencer marketing 3
famous,” they are typically relative unknowns
outside their sets of followers. Nonetheless, their
significant audiences enable them to garner
compensation of $50,000 per post. In contrast
with celebrity influencers, megainfluencers often
align their brands more closely with paid
partnerships.
3.3. Macroinfluencers
Macroinfluencers are influencers who have yet to
gain celebrity but nevertheless are extremely suc-
cessful, with followers numbering between 100,000
and 1 million. Two examples are The Sister Studio
(@thesisterstudioig) and Alyssa Rimmer (@simply-
quinoa). Macroinfluencers achieve strong engage-
ment rates and can harness their large followings for
substantial brand exposure, yet they typically
command a lower price per post compared to mega-
and celebrity influencers. Macroinfluencers can
thus provide brands with the most bang for their
buck. Macroinfluencers can earn over $1 million a
year and up to $5,000 per post, mostly through se-
lective brand partnerships and appearances. These
influencers are dominant within their subject do-
mains (e.g., travel, food, music), and their audi-
ences often aspire to be like them.
3.4. Microinfluencers
Microinfluencers are successful enough to make a
career out of being an influencer, but they are
smaller than macroinfluencers in both scale and
scope. Their audience tends to be more localized
to their geographic base, and most of their income
comes from affiliate-link programs or occasional
partnerships with brands (e.g., Nordstrom, the
Amazon Influencer Program). Their influencer
brands are also more fluid, as they often partner
with multiple and diverse industries. With follower
counts between 10,000 and 100,000, micro-
influencers usually depend upon social media
videos (e.g., Instagram stories), which help them
connect with their followers and heighten their
perceived accessibility and authenticity. Such
videos can influence sales significantly, as many
followers find microinfluencers’ recommendations
more genuine than those made by larger celeb-
rities, whom they may view as more prone to “sell
out.” For this reason, marketing managers are
increasingly working with microinfluencers, who
harness greater authenticity and trust and often
are more connected to the needs and interests of
their followers (Wissman, 2018).
3.5. Nanoinfluencers
Nanoinfluencers, such as Alexis Baker (@alex-
isbakerrr), are at the beginnings of their influencer
careers, and their followers are mostly friends,
acquaintances, and others who live close by.
Because nanoinfluencers offer their followers the
benefits of personal accessibility and high
perceived authenticity, they often generate the
highest engagement rates of all influencer cate-
gories. Nanoinfluencers may be individuals looking
to become prominent players within the industry,
or individuals who have organically experienced a
growth in followers through ordinary social media
behavior. These influencers are just beginning to
grow their follower bases and have fewer than
10,000 followers. They are just beginning to un-
derstand the industry and to establish their per-
sonal brands. As such, nanoinfluencers may be
lucrative prospects for brand partners since they
are often more open to unpaid partnerships and
free product samples in return for networking op-
portunities and increased exposure on social
media. Nanoinfluencers also tend to be the most
proactive influencers, in that they approach
brands to inquire about partnerships rather than
being approached themselves.
4. Unpacking the advertising functions
embedded in influencers
Having reviewed both the history and scope of
influencer marketing, we next turn to under-
standing the underpinnings of the influencer phe-
nomenon. In this section, we identify influencers’
component “parts” and discuss them in terms of
the advertising functions they offer. We argue that
Figure 2. Advertising functions that influencers
represent
4 C. Campbell, J.R. Farrell
all influencers, irrespective of their size, embody
three critical marketing functions: (1) access to a
potentially highly engaged audience, (2) an
established endorser persona, and (3) skills in so-
cial media management. Figure 2 is a graphical
representation of these functions.
4.1. Influencers as audiences
To marketers, one of the most important compo-
nents of an influencer is their audience. An influ-
encer’s audience comprises a set of consumers
who have opted in to seeing the influencer’s social
media content. An influencer’s audience provides
value to marketers by offering organic reach,
specific targeting, and increased attention.
4.1.1. Organic reach
Influencers’ posts often achieve sizable organic
reach, meaning that they are often seen by con-
sumers without any spending on advertising.
Similar to how social media platforms such as
Instagram report organic reach, many influencer
marketplaces now provide organic-reach metrics
to advertisers. While organic reach depends on
factors such as how much engagement a post re-
ceives (Lipsman, Mudd, Rich, & Bruich, 2012),
influencers are skilled at creating content that
maximizes engagement. Influencers’ organic reach
enables them to take advantage of indirect
appropriability (Liebowitz, 1985) and to charge
brands for the value their organic reach provides.
Since organic reach is often difficult for corporate
brands to achieve (Tien, 2018), many large brands
use influencers to promote new venturesdjust as
the Chicago Bears did to promote local clothing
designer Joe Freshgoods (Association of National
Advertisers, 2018). Influencers often drive
increased engagement to brand-related messaging
in a more effective and personal manner than
brands can do themselves.
4.1.2. Targeting
Most influencers’ audiences reflect specific tar-
geting, as most influencers specialize in a partic-
ular topic or niche area. Since consumers opt in to
following influencers, they often align closely with
their preferred influencers in terms of age,
geographic location, and stage of life (e.g., col-
lege, pregnancy). Many of these audience attri-
butes are listed in influencer marketplaces, so
targeting via influencers is similar to placing ads
online and on social media. Such targeting is
valuable not only because consumers are more
likely to respond positively to ads that are relevant
to them (Taylor, 2009) but also because influencers
inherently increase the level of trust within the
relationship, as consumers may feel the influencer
understands and appreciates them.
The targeting afforded through influencers is
even more valuable if a target audience’s interests
are not reflected in a brand’s current list of tar-
geting options. This can occur when emergent
trends have yet to be incorporated into targeting
settings, or in the case of niche groups. For
instance, advertisers can use influencers to reach
consumers interested in a specific disease, a
particular type of wine, or a certain style of
decorating. Influencers have even greater target-
ing value as the increased adoption of privacy
settings makes it hard to determine consumers’
interests. Consumers’ privacy concerns are
growing following a series of high-profile privacy
breaches involving social media (Baccarella,
Wagner, Kietzmann, & McCarthy, 2018). While
increased consumer control and greater trans-
parency of data collection can mitigate these
concerns (Aguirre, Mahr, Grewal, de Ruyter, &
Wetzels, 2015; Tucker, 2013), influencer market-
ing is a promising alternative; marketing through
influencers can enable specific targeting without
needing to collect private data. Influencers also
naturally cede control to consumers who opt in to
following them, making influencer placements
more valuable in cases where consumers or brands
are sensitive to privacy violations.
4.1.3. Attention
Influencer posts are likely to garner more con-
sumer attention than ads from a brand itself
(Pereira, Salgueiro, & Mateus, 2014), something
that can easily be assessed by comparing engage-
ment and response rates. Posts by influencers
often are more candid and real, especially posts
from nano- and microinfluencers, and these char-
acteristics can make influencer content feel more
authentic than traditional ads (Kowalczyk &
Pounders, 2016). This helps advertising agencies
and marketing managers confront a prominent
problem: Consumers often find digital advertising
annoying and untrustworthy (Cho & Cheon, 2004).
Consumers prefer less intrusive advertising when
online, so they respond more favorably to influ-
encer content, which is generally more subtly
styled and less overtly promotional than brand-
created ads.
Researchers have found that the content that
surrounds an ad’s placement affects how con-
sumers respond to it. Consumers respond better to
ads appearing within content they like (Coulter,
1998), content they find informative (Van
Reijmersdal, Smit, & Neijens, 2010), or content
The functional components underlying influencer marketing 5
that fits the surrounding mood (Lord, Burnkrant, &
Unnava, 2001). Placing an ad within the right
influencer’s content is likely to boost consumers’
motivation to process the ad (MacInnis & Jaworski,
1989) and facilitate their comprehension of its
message (Goodstein, 1993). Ad-context congruity
has been shown to boost consumers’ recollection
(Yaveroglu & Donthu, 2008) as well as their atti-
tude and purchase intentions (Shamdasani,
Stanaland, & Tan, 2001). For advertisers, these
findings point to a need to ensure a good fit be-
tween influencer and brand.
As the consumer decision-making journey
lengthens and becomes more cluttered (Lindsey-
Mullikin & Borin, 2017), the importance of multi-
ple ad exposures is growing. Influencers can grad-
ually introduce consumers to new products, keep
them informed, and remind them about the
products later on. Influencers offer a relatively
easy means of achieving serialized targeting,
which is often impossible through the standard
advertising tools found on social media ad plat-
forms. When targeting influencer-specific audi-
ences, brands can break down their more complex
narratives and communicate them over time as a
simpler series of posts.
4.2. Influencers as endorsers
A second component of influencers is the role they
play as endorsers. Influencers act as a reference
group to consumers, on whom they can exert
aspirational, informational, or attachment-driven
persuasion (Bearden & Etzel, 1982). Reflecting
these three respective effects, we next discuss
influencers as celebrities, experts, and fellow
consumers.
4.2.1. Celebrity status
Some endorsers are effective because they are
celebrities. A celebrity is someone “who enjoys
public recognition and who uses this recognition on
behalf of a consumer good by appearing with it in
an advertisement” (McCracken, 1989, p. 310). Not
all endorsers are celebrity influencers (see
Figure 2), but many endorsers’ followers view
them aspirationally. Celebrity influencers exert
value-expressive influence in that their persuasive
power stems from consumers liking or even
wanting to emulate them. They are particularly
effective at endorsing flashy luxury products
(Bearden & Etzel, 1982). Endorsers use their ce-
lebrity status to promote awareness (Kelting &
Rice, 2013), increase exposure in the press
(Erdogan, Baker, & Tagg, 2001), and both improve
attitudes toward the brand and increase purchase
intentions (Carrillat, d’Astous, & Lazure, 2013).
Research has shown that celebrities’ cultural as-
sociations can be transferred to a brand or product
(McCracken, 1989), and consumers can be moti-
vated to purchase advertised brands in order to
acquire the same associations (Bearden & Etzel,
1982; Biswas, Biswas, & Das, 2006).
Influencers are becoming celebrities in their
own rights; they are often recognized and
approached on the street, and they are admired
for their styles and opinions. Many consumers tune
in daily to watch influencers, whom they view as a
source of entertainment and inspiration. Given
that advertisements have a higher chance of suc-
cess when consumers find them entertaining
(Taylor, 2009), influencer marketing is an oppor-
tunity for advertisers to tap into engaged and
receptive audiences.
The persuasiveness of an advertisement that
features a celebrity is dependent upon the
perceived fit between the celebrity’s image and
the endorsed brand (Kahle & Homer, 1985; Kamins,
1990; Till & Busler, 2000). Researchers have found
that strategies using celebrity partnerships should
consider not only celebrities’ physical attractive-
ness (Kahle & Homer, 1985; Kamins, 1990) and
likeability (Miciak & Shanklin, 1994) but also their
perceived fit with the advertised brand (Fleck,
Korchia, & Le Roy, 2012). Marketers should there-
fore seek influencers who not only match their
brand but whose audience aspires to be like them.
4.2.2. Expertise
Many influencers are experts on specific product
categories, ideas, or lifestyles. For example, Kylie
Jenner (@kyliecosmetics) is a cosmetics expert,
and Gina Homolka (@skinnytaste) is a cooking
expert. An endorser’s credibility in a given area
affects their informational influence on consumers
(Bearden & Etzel, 1982; Lin, Bruning, & Swarna,
2018), and this effect is heightened the more a
product fits within an endorser’s area of expertise
(Till & Busler, 2000).
Whereas the effectiveness of celebrity en-
dorsers is driven by consumer aspiration, followers
of expert endorsers seek deeper evaluations of
messages and their sources (Biswas et al., 2006)
and wish to reduce uncertainty (Bearden & Etzel,
1982). Consumers often seek expertise as they
consider purchasing high-involvement products,
such as technology or cars, so marketers who wish
to leverage expert endorsers should look to
lengthier formats that enable more information to
be conveyed (Mudambi & Schuff, 2010), including
blog posts, videos on YouTube, and Instagram
stories. Expert endorsers’ trustworthiness has a
6 C. Campbell, J.R. Farrell
significant effect on the persuasiveness of their
message (Chu & Kamal, 2008); endorsers whom
consumers suspect of hawking products they do
not themselves use are less effective (Kapitan &
Silvera, 2016). Expert endorsers often highlight
both the positive and negative attributes of prod-
ucts they review, and this has been shown to make
reviews more persuasive (Mudambi & Schuff,
2010).
4.2.3. Fellow consumers
Influencers often present themselves as fellow
consumers. This makes them more persuasive, as
consumers view word-of-mouth product reviews
from fellow consumers as more trustworthy than
other reviews (Nielsen, 2015). Consumers are
persuasive since other consumers often perceive
them as disinterested parties (Dichter, 1966) and
as more similar to themselves (De Bruyn & Lilien,
2008). Many influencers have much in common
with their followers, such as similar interests, de-
mographics, life stages, or life events. Influencers
tend to cultivate a strong bond with their viewers,
stoking perceptions of authenticity, and in some
cases creating a kinship and sense of community.
This is valuable since consumers are more prone to
support individuals they like or are attached to
(Bearden & Etzel, 1982). Marketers should
examine each prospective influencer’s engage-
ment rate and place a premium on more effortful
engagement, such as comments and shares. Influ-
encers who form more intimate bonds with con-
sumers tend to carry more persuasive power. While
this can take some work to assess, marketers
should look at how often influencers respond to
followers and at how much personal information
they share in their posts.
4.3. Influencers as social media managers
Influencers can act as social media managers on
behalf of their advertisers, and this role forms
their third major component. This role is best
considered as a spectrum. On one end, a brand
may want an influencer to do very little aside from
appear for a photoshoot and then post resulting
brand-created and approved images to their social
media. In other cases, a brand may expect an
influencer not only to strategize and create the
content they post but also to manage resulting
interactions with their followers.
4.3.1. Content producers
Content production is the most visible aspect of
the influencer’s role. Influencers and their teams
are often notably skilled at directing, producing,
and editing social media content for their brand
partners. For example, influencers working with
the restaurant chain Sonic created engaging,
branded videos to introduce the company’s new
lemonade and limeade flavor combinations (IAB,
2018). Influencers’ content-production functions
may be particularly important to small companies
that don’t know how to create content that will
resonate with a particular target audience. The
public nature of influencers means marketing
managers can review an influencer’s creative tal-
ents before drawing up a contract, which lowers
the risk of hiring a creative agent who does not
match the vision or objectives for a given
campaign.
In other cases, brands may prefer to give influ-
encers much less autonomy or creative control.
Just as when dealing with advertising agencies,
brands may supply influencers with a creative brief
and detailed guidelines about how a brand and
product should be depicted, and they may require
that all content be vetted before posting. Brands
should know both that this content-production
spectrum exists and that an influencer’s place
within it is negotiable.
4.3.2. Strategists
In addition to being content producers, influencers
can act as content strategists. By blending their
knowledge of their audience and the needs of their
brand clients (Zhu & Chen, 2015), influencers can
work to develop compelling content that resonates
with their followers. Influencers have extensive
experience with and insight into their followers.
This is not always true of advertising agencies,
which may represent a portfolio of brands with
very different target audiences. In partnering with
influencers, marketing managers have the unique
opportunity to work alongside creative agents who
are intimately involved with their customer bases.
As many influencers operate within niche cate-
gories (e.g., everyday fashion, DIY home decor,
international travel), they can advise at a strategic
level how best to appeal to their followers. They
are also aware of which creative approaches pro-
vide their followers with the most value and
entertainment, factors that are known to reduce
the intrusiveness of online ads (Ying, Korneliussen,
& Grønhaug, 2009). This combination of strategic
and creative insights enables influencers to know
which content will resonate with, and be seen as
authentic by, their followers.
4.3.3. Community managers
After posts go live on social media, influencers and
their teams often interact with their audiences,
The functional components underlying influencer marketing 7
potentially acting as community managers. This
not only encourages and amplifies engagement,
further expanding organic reach, but also provides
a support function. In many cases, influencers
provide a complete content-creation package that
otherwise might require the collaboration of mul-
tiple agencies and contract professionals. Influ-
encers constantly engage with their followers
through stories and live sessions, as well as by
asking for feedback, cocreating content, and
responding to comments and messages. While such
engagement not only serves an important social
media response function for advertisers, research
has also found that interactive digital marketing
efforts are more effective than noninteractive
ones (Taylor, 2009). This is especially true of
marketing that targets millennials, who are known
to care more about engaging in communities than
about ads themselves (Newman, 2015).
5. Advice for marketing managers
In this article, we describe the three component
parts of influencers: the audience, the endorser,
and the social media manager. Influencers are
playing an increasingly significant role within
marketing, as consumers are becoming more
active participants in the marketing process
(Hanna, Rohm, & Crittenden, 2011). We advise
marketing managers to scrutinize the value influ-
encer’s offer in terms of their different function-
alities and to consider how combining these
functionalities may prove more effective than
traditional forms of advertising.
5.1. With influencers, the whole is greater
than the sum of its parts
While influencers provide three unique compo-
nents of interest to brands, greater strength
potentially arises when all three arise in a single
person. The interplay of deep audience insight,
creative expertise, and experience managing so-
cial media make for a powerful combination. In
many cases, influencers may embody more
knowledge about a target audience than many
advertising agencies, which often only address a
single aspect of a client’s work (e.g., market
research, social, or creative). Bundling these
functions into a single entity facilitates greater
creativity and faster execution of processes, with
the inherent benefit of lower associated costs
given the one-stop-shop setup. Macroinfluencers in
particular provide brand managers with a highly
skilled, highly trusted, anddcompared to
celebrity influencersdrelatively cost-effective
marketing outlet that is positioned to garner high
engagement rates and more exclusive brand
awareness (Main, 2017). Marketing managers can
thus exploit influencers’ functional components
either discretely or as an entire marketing
package.
5.2. Influencers may be undervalued
A good starting point for assigning value to influ-
encers is to consider how many followers they
have, which is a proxy for their reach (Chen, 2017),
though full valuation of influencers should account
for all sources of value. Such a valuation would
include organic reach, engagement, and such
qualitative criteria as post consistency and quality.
Assessment of these criteria is driving strong in-
terest in micro- and macroinfluencers, who often
represent better value than their counterparts due
to their higher engagement rates (Wissman, 2018).
Targeting is an additional source of value, as some
niche audiences tend to be more expensive or even
impossible to target using standard targeting tools.
Beyond audience characteristics, marketing man-
agers should expect to pay a premium for well-
known celebrity influencers or expert endorsers,
as both carry with them higher degrees of con-
sumer trust, and the halo effects of their en-
dorsements may linger (Erdogan et al., 2001). This
is especially true of cases in which a brand con-
tracts with the same influencer over an extended
period of time, as the value of their endorsement
and community management may increase with
stronger association. Finally, both the value of
ideating and developing content and the value of
active engagement with consumers should be
considered given the immense time, effort, and
energy each influencer contributes to the brand
partnership. We encourage marketing managers to
carefully consider all of the components, looking
beyond reach and engagement metrics.
5.3. Not all influencers are created equal
It is helpful to understand the differences among
influencers in terms of skill sets, engagement ap-
proaches, and power sources. Each influencer
category (see Figure 1) comes with a unique skill
set and therefore a unique strategic marketing
purpose. As a result, marketing managers may
want to use several influencers from different
categories within the same campaign to make the
most of their unique contributions. Influencers
within the celebrity and megainfluencer categories
harness both developed and established cultural
8 C. Campbell, J.R. Farrell
capital, granting them perceived expertise (Biswas
et al., 2006). Partnering brands will especially
benefit from these influencers’ endorser functions
because many consumers idolize celebrities’ per-
sonas. But such celebrity appeal should be
balanced through the use of micro- and macro-
influencers, as brands may be able to capitalize on
the air of accessibility and authenticity that comes
naturally to these smaller-scale influencers. Given
the personal nature of these influencers’ in-
teractions with their followers, brands may benefit
from more engaged audiences and active social
media managers. The development and imple-
mentation of an influencer marketing strategy
should therefore entail careful consideration and a
collaborative fit between influencers of different
sizes and capabilities.
5.4. Risks of influencer marketing
Marketing managers should be aware that influ-
encer marketing campaigns also come with risks.
One risk comes simply through involving multiple
people in content creation for a brand. If clear
guidelines are not in place, brands risk diluting
their brand meanings or even diverging from
corporate goals. Brands also run the risk of close
and negative associations with individuals prone to
personal indiscretions or scandal. With the growth
of influencer fame comes increased public visibil-
ity. As discussed earlier, influencers often carry
with them a celebrity status that has the potential
to denigrate the brand reputation should the
influencer deviate from brand expectations or
engage in morally offensive behavior. Knittel and
Stango (2013) estimate that shareholders of Tiger
Woods’s sponsors lost between $5 and $12 million
following revelations of his infidelity and his arrest
for driving under the influence of alcohol or drugs.
Brands that partner with mega- and celebrity
influencers must remain cognizant of the often
sensitive and fickle nature of highly visible
partnerships.
Another risk inherent to influencer marketing
arises because of a historical focus on metrics,
which causes many influencers to pay for follower
bots or engagement bots in order to inflate their
success metrics. While firms can attempt to
circumvent this issue by focusing on more robust
engagement-rate metrics (e.g., comments and
shares), many influencers still purchase follower
bots to appear more competitive and attractive to
brands (Daniels, 2018). As such, managers should
assess the full spectrum of engagement and view
historical follower-count patterns to check for
drastic and inexplicable increases in followers.
Finally, we caution marketers that they are
responsible for ensuring adequate disclosure is
present on any posts made by influencers on their
behalf. The Federal Trade Commission has pub-
lished an endorsement guide and associated FAQ
(FTC, 2017) that, along with the IAB’s (2018) guide,
all marketers should review. Since the influencer
market is an evolving space (Campbell & Grimm,
2019), best practices may change, and adver-
tisers who employ influencers would be wise to
keep abreast of those changes.
6. Conclusion
Influencer marketing will undoubtedly continue to
gain traction in the coming years. In a movement
that some have called confluence culture, there is
broad recognition that the advertising industry
must “adapt to embrace the new reality of inter-
active content, emerging media, and production/
consumption methods” (Sheehan & Morrison, 2009,
p. 40). Even for skeptics, the significant influx of
players into the influencer market, coupled with
influencers’ effectiveness, makes the marketing
tactic difficult to ignore. Marketing managers
should be prepared to use influencers within even
their broadest marketing campaigns and to
consider how this emerging marketing phenome-
non may improve their overall brand strategies.
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