What is Web 2.0?

Web 2.0 is, ultimately, the changeover and transformation of the web as we know it into a computing platform that will house software similar to what we have on our own personal computers, so that we can access our programs and files from anywhere in the world via the internet and not be constrained or limited to the information on our computers. This will facilitate file and application sharing and development as well as the ability to cross polinate initatives with peers/colleagues all over the world.

What is Web 2.0?
Web 2.0 is just a buzzword. Essentially, it's a natural evolution of web based software. It involves the use of more interactive websites where, for example, you can drag-and-drop and bring up context-sensitive menus. All this, as the second answerer said, results in the development of websites which are more like regular programmes. Most 'Web 2.0' defined sites use a popular technique known as Ajax. I've linked the Wikipedia article for this and Web 2.0 below.
Reply:Yet another definition is that Web 2.0 is the "live Web". New companies like MySpace, YouTube, Dabble, and Flickr among many other new Silicon Valley startups, are usually mentioned when reading about Web 2.0
Reply:As far as I know, Web 2.0 is a new turnover of internet.


We can relate it to the mobile generations, as now third generation mobiles and telecommunication technology is being introduced.


An example of Web 2.0 is the AJAX technology.





Probably Gmail uses the same technology.
Reply:We're all probably running on Web 1.0, which runs on a slower set of algorithms and things than Web 2.0. Web 2.0 requires extremely fast computers; usually only labs and universities have computers that can run Web 2.0. (SLAC is one of them http://www.slac.stanford.edu/ )