The document discusses growing and maintaining audiences on social media. It argues that audience growth requires not just more people seeing information, but also people who consume the information and form a lasting community. It outlines three steps: 1) growing the total number of people who see content by optimizing for social sharing and creating niche content, 2) ensuring the content meets viewers' expectations so they engage and consume it, and 3) providing opportunities for lasting engagement like subscriptions, comments, and personalized messaging to develop a committed community over the long term.