Facebook started as a social network for college students but is now open to all ages 13 and up. Users can create profiles, connect with friends, and share photos and videos. However, Facebook's business model relies on using user data for targeted advertising, which has compromised user privacy. Early policies like Beacon and lack of deletion option violated privacy. Features like News Feed and third party quizzes also gave away more private data than users realized. As Facebook focuses on profits, it must find a better balance with protecting user privacy and giving users more control over their personal information.