People say that Facebook is for connecting with the people you went to school with and Twitter is for people you wished you had gone to school with. While Facebook is a multi-purpose social networking platform, allowing users to chat, post photos and notes unlimited post length, and play games. Twitter is built the posting of short 140 character messages, or “tweets.” It can’t edit post and play games. But Twitter can follow trending topics. They both different users express approval of content. They are the two most popular social networks in the world. This comparison looks at their usability.