Facebook is a social networking website that is operated and privately owned by Facebook, Inc. Since September 2006, anyone who confirms themselves to be over the age of 13 with a valid e-mail address can become a Facebook user. Facebook's target audience is more for youths than adults. Users can add friends and send them messages, and update their personal profiles to notify friends about themselves. Additionally, users can join networks organized by workplace, school, or college. The website's name stems from the colloquial name of books given to students at the start of the academic year by university administrations in the US with the intention of helping students to get to know each other better