Allows users to interact with the page, Users may be able to comment or create a user account, Folksonomy - allows users to categorize and classify information using freely chosen keywords (e.g., tagging), Rich User Experience - Content is dynamic and responsive to user’s input, Long Tail - Services are offered on demand rather than on a one-time purchase, User Participation - Others can contribute content through comments, reviews, and evaluations, Software as a Service (SaaS) - Users subscribe to software only when needed