Who is not familiar with Facebook, is one of the social networking site from the beginning of creation until now a well known and liked among adolescents. Facebook is a site that makes its creator get a huge profit. Until now no one can compete with Facebook. Facebook was founded by Mark Zuckerberg with his roommate and fellow computer science students Eduardo Saverin, Dustin Moskovitz and Chris Hughes.Keanggotaan web site was originally limited to Harvard students only, then expanded to other colleges in Boston, Ivy League, and Stanford University. This site is slowly opening up to students at other universities before it opened to high school students, and eventually to every person aged at least 13 years. January 2009 Compete.com study puts social networking service Facebook as the most widely used according to monthly active users around the world, followed by MySpace. Entertainment Weekly put it in the list of "best" end of the decade with the comment, "How can we ex-lover stalking us, remember our colleague's birthday, interfere with our friends, and play a game of Scrabulous before Facebook was created?" Quantcast estimates that Facebook had 135.1 million visitors monthly in the U.S. in October 2010. According to Social Media Today in April 2010, estimated that 41.6% of Americans have a Facebook account.
