The document discusses how to build authority in social media marketing. It likens authority to gravity, stating that one must gain social mass by participating in conversations and connecting with others. This increases one's gravitational pull and ability to attract traffic and followers. Hosting a popular Twitter chat further increases one's mass and expertise. Maintaining the community requires using discussion topics for blog posts, recruiting community members as guest bloggers, promoting within chats, maximizing the hashtag, and asserting dominance of the hashtag.