Mark Zuckerberg created Facebook in 2004 at Harvard with fellow students Eduardo Saverin, Dustin Moskovitz, and Chris Hughes. Facebook launched as a social networking website that allows users to create personal profiles, add friends, send messages, share photos and interests, and join groups. While Facebook helped foster connections between new and old friends, it also faced criticisms like overuse, weakening real-world relationships, addiction, stalking risks, and certain countries intermittently blocking access.