The document provides an outline about Facebook, including its history, uses, how to create an account, largest user segments, reasons for use, advantages, disadvantages, privacy and security issues, and how to protect children. Facebook was founded in 2004 by Mark Zuckerberg and other Harvard students. It later expanded to other universities and now has over 500 million users worldwide. People use Facebook to connect with friends and family, communicate, share photos and videos, find others with similar interests, and stay in touch with old friends. While it allows widespread connections, it also poses privacy, addiction, and relationship weakening risks that require safety precautions.