This document discusses how Twitter can be used for social good. It provides examples of hashtags like #TheDress that sparked online discussions and campaigns. It explains the basic functions of Twitter like replying, retweeting, favoriting tweets. It discusses how hashtags help people find relevant content and how trending topics appear on the left sidebar. It outlines benefits like reaching interested audiences and engaging in conversations. Tips are provided for live tweeting events like picking a hashtag, engaging with speakers, and sharing photos to visualize the event for those not attending.