This document discusses how businesses can build online communities to help grow their business. It explains that communities can provide inexpensive product research, customer support, and help turn customers into advocates. The document then provides tips on understanding potential customers, listening to conversations around relevant keywords, evaluating existing communities, and determining if a business needs to create its own community. Finally, it outlines different tools that can be used to create an online community, such as discussion forums, groups on social networks, message boards, and dedicated social networks.