Facebook is a social networking service and website launched in February 2004, operated and privately owned by Facebook, Inc.As of January 2012, Facebook has more than 800 million active users.Users must register before using the site, after which they may create a personal profile, add other users as friends, and exchange messages, including automatic notifications when they update their profile. 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".
Facebook connects people with friends and others who work, study and live around them. People use Facebook to keep up with friends, upload an unlimited number of photos, post links and videos and learn more about the people they meet.
