From a social psychological standpoint, the selfie phenomenon seems to stem from two basic human motives. The first is to attract attention from other people. Because people’s positive social outcomes in life require that others know them, people are motivated to get and maintain social attention. By posting selfies, people can keep themselves in other people’s minds. In addition, like all photographs that are posted on line, selfies are used to convey a particular impression of oneself. Through the clothes one wears, one’s expression, staging of the physical setting, and the style of the photo, people can convey a particular public image of themselves, presumably one that they think will garner social rewards.
~ Mark R. Leary