Facebook was founded on February 4, 2004 by Mark Zuckerberg and others. It started as a social network for Harvard students and expanded to other universities. Facebook now has over 2 billion monthly active users who access it through mobile phones, desktops, laptops, and tablets. The company has acquired other popular platforms like Instagram and WhatsApp, and has a simple, easy to use interface with features like the News Feed, messaging, sharing, and following people and pages.