Facebook is an American online social media and social networking service company which is situated at Menlo Park, California. The Facebook was launched on February 4, 2004, by Mark Zuckerberg along with his friends. It has been accessed from a wide range of devices with Internet connectivity, such as desktop computers, laptops and tablet computers, and smartphones. After registering, users can create a customized profile indicating their name, occupation, schools attended and so on. In Facebook, you can add the other users as friends and then exchange messages, post status updates, share photos, videos and links, also use various software applications , and receive any notifications from the other users’ activity. In addition, you can join groups which has been organized by workplace, school, hobbies or other topics, and categorize their friends into lists such as “People From Work” or “Close Friends”. In addition, the build and release process has zero downtime and new changes has been rolled out in a daily process.