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Web 2.0 is a trend in the use of world wide web technology and web designingthat aims to facilitate creativity, information sharing, and, most notably, collaboration among users. These concepts have led to the development and evolution of web-based communities and hosted service, such as social networking sites, wikis, blogs, and folksonomies.The term became notable after the first O'reilly Media Web 2.0 conference in 2004. Although the term suggests a new version of the world wide web, it does not refer to an update to any technical specifications, but to changes in the ways software developers and end users use webs.According to Tim O'reilly.
Web 2.0 is the business revolution in the computer industry caused by the move to the internet as platformand an attempt to understand the rules for success on that new platform.
Web 2.0 websites allow users to do more than just retrieve information. They can build on the interactive facilities of WEB 1.0 to provide network as platform computing, allowing users to run software-applications entirely through a browser. Users can own the data on a Web 2.0 site and exercise control over that data. These sites may have an "Architecture of participation" that encourages users to add value to the application as they use it. This stands in contrast to very old traditional websites, the sort which limited visitors to viewing and whose content only the site's owner could modify. Web 2.0 sites often feature a rich, user-friendly interface based on Ajax, Flex or similar rich media. The sites may also have social networking aspects. The concept of Web-as participation platform captures many of these characteristics. Bart decrem, a founder and former CEO of Flock calls Web 2.0 the "participatory Web and regards the Web-as-information-source as Web 1.0.
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