This document discusses the history and present state of social networking. It begins by defining social networks and providing examples of early social networking sites from the 1990s like Classmates.com and SixDegrees.com. It then discusses the rise of modern sites in the 2000s like Friendster, Myspace, and Facebook. The document outlines key facts about social media usage among teens and presents both advantages like community building and disadvantages like privacy risks. It concludes by providing tips for safe social networking for both youth and parents.