Web 2.0 and social networks exist and thrive because users communicate with each other. They engage in conversations with each other, commenting and responding to information on the web. The conversation started with email, bulletin boards, forums and newsgroups. Now you will probably update your Twitter status and you will talk about what you are doing on Facebook. You can comment on blogs, take a quick online survey or respond to a poll on a website. You can take notes during a webcast and store them online. All of this and more is possible with Web 2.0.
Web 2.0 is a term associated with web applications that allow user interaction.
These applications facilitate interaction, information sharing and collaboration ...