Facebook is the largest social networking site in the world with over 300 million users. It allows users to connect with friends, interact through messaging and groups, and share photos and apps. While it provides opportunities for advertisers to reach target markets and tools for businesses to promote products, maintain customer connections, and follow news feeds tailored to interests, Facebook also faces challenges of maintaining vast amounts of user data, privacy and data sharing concerns, and difficulty generating sufficient revenue from small banner ad payments and user information.