The document provides guidance on building an online community. It defines an online community as a group that communicates and pursues interests over the internet. Reasons to build a community include growing business, increasing brand loyalty, and testing new ideas. Approaches to starting a community include creating your own site or group on an existing platform. Examples are given of successful communities like Etsy, American Express, and iFixit. Tips for community growth include posting engaging content, using social media, networking at events, email marketing, and targeted outreach. Moderating a large community may require hiring a manager. The overall message is that building community takes time but provides business value.