The document discusses how to use Twitter effectively to build and sustain relationships. It explains what Twitter is, how it works through features like tweets, follows, direct messages, retweets and hashtags. It recommends using Twitter to connect with an audience and achieve goals like branding, messaging, feedback and calls to action. The document advises acting as a connector rather than just a broadcaster by engaging in balanced interactions. It suggests tracking analytics like followers, mentions, retweets and clicks to measure effectiveness. Tools are listed to help optimize use of Twitter.