Web 2.0

What is Web 2.0?

Amorphous. Intangible. Indefinable with a simple sentence. Luckily, this year, one of the creators of the term, Tim O'Reilly, attempted to do just that:

Web 2.0 is the network as platform, spanning all connected devices; Web 2.0 applications are those that make the most of the intrinsic advantages of that platform: delivering software as a continually-updated service that gets better the more people use it, consuming and remixing data from multiple sources, including individual users, while providing their own data and services in a form that allows remixing by others, creating network effects through an "architecture of participation," and going beyond the page metaphor of Web 1.0 to deliver rich user experiences.
From:http://http//www.seomoz.org/web2.0