Facebookis an online social networking serviceheadquartered in Menlo Park, California. Its website was launched on February 4, 2004, by Mark Zuckerbergwith his Harvard Collegeroommates and fellow students Eduardo Saverin, Andrew McCollum, Dustin Moskovitzand Chris Hughes. [ 8 ] [ 9 ] [ 10 ]The founders had initially limited the website's membership to Harvard students, but later expanded it to colleges in the Boston area, the Ivy League, and Stanford University. It gradually added support for students at various other universities and later to high-school students. Since 2006, anyone who is at least 13 years old was allowed to become a registered user of the website, though the age requirement may be higher depending on applicable local laws. [ 11 ]Its name comes from the face bookdirectories often given to American university students. [ 12 ] After registering to use the site, users can create a user profile, add other users as "friends", exchange messages, post status updates and photos, share videos, use various apps and receive notifications when others update their profiles. Additionally, users may join common-interest user groups, organized by workplace, school or college, or other characteristics, and categorize their friends into lists such as "People From Work" or "Close Friends". Also users can complain or block unpleasant people. Facebook had over 1.18 billion monthly active usersas of August 2015. [ 7 ]Because of the large volume of data users submit to the service, Facebook has come under scrutiny for their privacy policies. Facebook, Inc. held its initial public offeringin February 2012 and began selling stock to the public three months later, reaching an original peak market capitalizationof $104 billion. On July 13, 2015, Facebook became the fastest company in the Standard & Poor's 500 Indexto reach a market cap of $250 billion History By Year 2015 1,000,000,000 People, Together 2012 More Than 1 Billion Active Users 2012 Hacked the NASDAQ Button 2011 Moved to New Home 2010 Launched Like Button 2006 Facebook Opens for Everyone 2005 High School Students Join Facebook 2004 College Students Join Facebook DETAILS... https://en.m.wikipedia.org/wiki/Facebook