What is web 2.0

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"Web 2.0" refers to the use of the Internet for interpersonal content sharing and online service delivery. Whereas the unnamed "Web 1.0" that came before it was largely concerned with creating and viewing online content (reflected in the browser wars and in a proliferation of websites that few people ever visited), the Web 2.0 concept highlights services that allow people to find and manipulate content, coupled with those that enable all types of media and services to be published and inter-linked (or "mashed") in places that lots of people actually know about.