Facebook is the largest social network worldwide with over 300 million users. It allows users to connect and interact through messaging, groups, photo sharing, and apps. While it provides opportunities for advertisers, maintaining vast amounts of user data requires huge expenditures and Facebook spends more than it earns from advertising. Facebook has struggled to find profitable ways to monetize user data without violating privacy or facing user backlash. Attempts like tracking user purchases through a Beacon program and sharing user data with third parties met significant resistance. Facebook now focuses on developing applications through an open platform.