Facebook is the world no.1 online social networking sites. this is the very good and great useful sites for every one.and every person on earth like facebook .beacuse facebook give the lot of information, datas, and entertainment. facebook headquarters service is placed in menlo park california, united states.facebook is founded by mark zuckerberg . facebook is founded on 4th february 2004. facebook is available in different varient like facebook lite and facebook messenger application.in facebook more than billion users are surfing the sites