The document discusses building an online community to promote physical activity guidelines, highlighting that one in three Americans have a social networking profile, with younger demographics being the most engaged. It emphasizes the characteristics of online communities, such as continuity, shared goals, and the emergence of community leaders, while outlining a vision for a virtual space to facilitate networking, information sharing, and collaboration. The document also notes the importance of usability, user expectations, and maintaining engagement with stakeholders through online platforms.