If you want a job, it definitely makes sense to be LinkedIn!
Interestingly, LinkedIn allows its users to write each other testimonials and recommendations. As a result of the high rate of qualified specialists among LinkedIn users, these recommendations may have influential effects on employers. Overall, an audience of qualified specialists creates a sense that references being written are by those in “authority”. According to Cialdini (2007), information being presented by an authoritative source may be especially trusted and may, therefore, influence people to think highly of the person. Even though there is no evidence of who is writing it, a positive Linked-in recommendation from a complete stranger may be beneficial in finding a job. Authority is certainly something viewed positively.
Moreover, according to the principle of social proof - that a person may look to other people to imitate what they are doing in a case of uncertainty and this will provide guidance for his actions. Social proof becomes more influential when the surrounding people are perceived as particularly knowledgeable about a situation (Cialdini, 2007). Therefore, if others think highly of a candidate, that should make the person examining the candidate think highly of her/him as well.
Cialdini, R. B. (2007). Influence: The psychology of persuasion. New York: Collins.
Papacharissi, Z. (2009). The virtual geographies of social networks: a comparative analysis of Facebook, LinkedIn and ASmallWorld. New media & society, 11(1-2), 199-220
Rapanta, C., & Cantoni, L. (2017). The LinkedIn endorsement game: Why and how professionals attribute skills to others. Business and Professional Communication Quarterly, 80(4), 443-459.