Facebook is a leading social networking platform founded in 2004 by Mark Zuckerberg and his Harvard University roommates. Originally designed as a way for college students to connect online, it quickly expanded to include users worldwide, evolving into a multifaceted service with billions of active monthly users. The platform allows individuals to create personal profiles, share photos, videos, status updates, and news articles, while fostering connections through friend requests, groups, and events. Features like Facebook Messenger enable real-time chatting and video calls, Marketplace facilitates local buying and selling, and Pages support businesses, celebrities, and organizations in building audiences. Beyond social interaction, Facebook serves as a hub for advertising, live streaming, and community building, influencing global communication and culture. However, it has drawn scrutiny over issues such as data privacy breaches, the spread of misinformation, and algorithmic biases that can amplify divisive content. As part of Meta Platforms Inc., it continues to innovate with virtual reality integrations and augmented reality tools, shaping how people interact in the digital age.