Mark Zuckerberg is an American businessman and computer programmer. He is best known for co-founding Facebook, a major social media platform, and its parent company Meta Platforms. Zuckerberg holds the roles of chairman, chief executive officer, and is the controlling shareholder of Meta. He has played a central part in the development and growth of social networking on the internet. Under his leadership, Facebook expanded its services and acquired other companies, shaping the way people connect and share information online.