This document discusses Facebook, its history and founder Mark Zuckerberg, statistics on its users, advantages and disadvantages of using Facebook, signs of addiction, and potential harms of Facebook addiction. It notes that Facebook was founded by Mark Zuckerberg and others at Harvard and now has over 500 million active users, with 71% of US internet users on the site. The advantages include staying connected with friends, but disadvantages include weakening long-distance relationships and potential addiction issues. Signs of addiction include constantly checking Facebook and prioritizing it over other responsibilities. Harms of addiction may include divorcing friends and losing real-world relationships.