What is define facebook?

Facebook is a social networking website and online platform that allows registered users to create profiles, upload photos and videos, send messages, connect with friends, family, and colleagues, and share interests. It was launched in February 2004 by Mark Zuckerberg and his college roommates, Dustin Moskovitz and Eduardo Saverin, as a platform for students at Harvard University, but has since expanded to include users of all ages and nationalities. As of 2021, Facebook has over 2.8 billion monthly active users, making it one of the most popular social networking sites in the world. The company is headquartered in Menlo Park, California and generates revenue primarily through advertising.