Twitter is a social network launched in 2006. It allows the registered members to broadcast their short posts called Tweets. It is to discover people in online and following their tweets as long as it’s interesting. Currently, Twitter has more than 320 million users. The default settings for Twitter are public and anyone can follow anyone on publicTwitter. Tweets are restricted to 140 characters. Twitter can be used both personal and rapid. Celebrities use Twitter to build a more personal connection with their fans.