This document discusses the topic of social media and its implications. It begins with a poll asking what social media platforms people use. It then provides a definition of social media as media platforms with social components and public communication channels, including examples like Facebook and FriendFeed. The document goes on to discuss information sharing on social media and some implications to consider regarding privacy and audience when setting up social media sites. This week's tasks are to participate in a Facebook discussion and explore how Facebook, Twitter, and Pinterest are being used.