This document discusses safe social media use and provides information about popular social media sites and apps. It begins by defining social networking and listing its goals of informing about trends and providing safety tools. It then discusses the prevalence of social media and smartphone use among teens. Examples of popular sites like Facebook, Instagram, Snapchat, Twitter, Kik, Vine, Whisper, and others are described. The key risks of inappropriate content, bullying, location sharing, and interacting with strangers are covered. The document concludes by offering safety tips like keeping profiles private, only connecting with known people, avoiding embarrassing content, and respecting others. It warns about the legal risks of sexting.