Mobile apps market is a growing market and the main technological enabler of apps are push notifications (PN). Today, users are currently receiving a daily average of 63 PN.
After an introduction that highlights the relevance of PN, this chapter covers the background of its topic –pop-up messages that emerge on the smartphone screen- and its characterization: (1) proactive communication with the user; (2) explicitly authorized through an opt-in request; (3) wide range of content, private and social, sent by social networks, commercial companies, or news publishers from apps or web site; (4) targeted according to the users’ interests, previous behaviors, or time of day; (6) always prompting the user to click on the PN that will land on the sender’s app / web site.
There is a steep competition for the user's attention to click through the PN message. Thus the chapter moves through to discuss the factors that influence the choice of whether to open or ignore a PN: (1) Timing in the delivery, disruption, and systems for managing PN in a non-disruptive way. (2) Top-down factors in PN usage, such as user profile, user reaction times, and user interest in the content (3) Bottom-up factors, such as message textual and visual features as an antecedent of click-through rate.
Before concluding, the chapter suggests future directions for researchers and practitioners: how to increase opt-in rates, user experience of PN, reasons to opt-out …
The chapter ends with a conclusion and a list of references.