I believe I could be of assistance in answering this one. Maybe not in too much detail but as much as I know.
Web 2.0, in simple terms, has been the next step in internet technology in order to make it a more social platform for people to interact with each other. Web 2.0 has introduced us to blogging, rss, social bookmarking, video sharing and many other applications that have changed the internet world. In addition to social networking it has made a tremednous change.