Facebook is a social media platform that was founded in 2004 by Mark Zuckerberg and his college roommates at Harvard University. It is one of the most popular social networking sites in the world, with over 2.8 billion monthly active users as of 2021.
Facebook allows users to create personal profiles, connect with friends and family, join groups and communities, and share content such as photos, videos, and updates. It also provides a platform for businesses to create pages and advertise their products and services to a large audience.