Facebook is a global social networking platform launched in 2004 by Mark Zuckerberg, Eduardo Saverin, Andrew McCollum, Dustin Moskovitz, and Chris Hughes while at Harvard University. It allows users to create profiles, share photos and videos, post updates, and communicate through messages and groups. Acquired under the parent company Meta Platforms in 2021, Facebook remains one of the most widely used social media services worldwide, influencing communication, marketing, and digital culture.