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What is Web 2.0

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Web 1.0 :
Originally, the World Wide Web was conceived as a mechanism for presenting text and image-rich pages connected together by hyperlinks that anyone could access as long as he or she had a computer and online access. This essentially was Web 1.0.

Web 1.5 :
As the Web developed, it became clear that, in enterprise environments, a lot of information was held as structured information within business applications.Enterprise portals could link information from these sources; these portals became Web 1.5.

Web 2.0 :
As enterprise portals became more popular, the Web transformed from a pure information source to one that provides a variety of services, which have now become a vital part of a user’s day-to-day toolbox, both for personal and business use. As these new service concepts have emerged, users’ expectations of the interaction level have changed as well. In the Web 1.0 era, plain information pages were sufficient. However, today’s users expect highly interactive web experiences,
conceptually and technically. The IT response to these expectations has given rise to "the next generation Web" or Web 2.0.

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