Michael R. Williams’s research while affiliated with Illinois State University and other places

... Planning a promotional strategy with social media will be effective in increasing product sales [20,22], this is due to the company's continued connection with customers [23]. This has been proven by Casaló et al., [24] in revealing why Athens as a favorite tourist destination is more due to the influence of social media [20], especially [20] also emphasized that attracting social media audiences will be more effective if balanced with the use of social media influencers. ...

Reference:

Influencers in Tourism Digital Marketing: A Comprehensive Literature Review

... This category pertains to decisions related to sales strategies, pricing, sales promotion, and customer service aimed at increasing product sales [72]. ...

Reference:

A Systematic Review of Machine Learning for Hybrid Intelligence in Production Management

... On the one hand, the personal sale is a personal communication, while advertising and sales promotion are non-personal tools. On the other hand, in a personal sale, the audience perceives the message as passed on by the organization, while in publicity even when it takes the form of personal communication, the audience perceives the media rather than the organization as the source of that message (Ingram et al., 2015). ...

Reference:

Competing through sales - Salesperson capability to enhance competition