Facebook is a social media platform that allows users to connect with friends and family, share updates, photos, and videos, and join groups and communities. It was founded in 2004 by Mark Zuckerberg and is now the largest social media platform in the world, with more than 2.7 billion active users. On Facebook, you can create a personal profile, add friends, and share information about yourself and your interests. You can also use Facebook to connect with organizations, businesses, and public figures, and to discover and join communities of people with similar interests. In addition to its original website, Facebook also offers a range of apps for mobile devices, including Facebook Messenger for messaging and Facebook Lite for areas with low internet connectivity.