Fuel self-esteem. In a Cornell University study, students felt better about themselves after they updated their Facebook profiles; a control group of students who didn’t log onto the site didn’t experience such a mood lift. The very act of posting something about yourself — regardless of what you write — can boost your self-confidence because you control the image you present to your network of friends, according to researchers.
Similarly, according to a Michigan State University study, students with low self-esteem and happiness levels who used Facebook more frequently felt more connected to friends and campus life than those who logged on less often.