This document discusses key characteristics of Web 2.0 including communication, dynamic content, direct response and interaction, using the community network, and building bottom-up through mashups. It provides examples like RouteYou, which allows users to create and share cycling routes. It also discusses views on Web 2.0 like collective intelligence versus collective stupidity. Privacy is discussed as a concern, as personal data on sites can be exposed. Trends are mentioned like the shift to indirect revenue models and free maps/navigation challenging traditional paid services.