Web 2.0 is a web application that facilitates participatory information sharing, interoperability, user centered design and collaboration on the World Wide Web. It allos users to interact and collaborate with each other as well.

Examples of the Web 2.0 include:
- Social networking sites
- Blogs
- Wikipedia
- Video Sharing
- Hosted Services
- Web Application
- Mash Ups
- Folksonomies

The term Web 2.0 was at first used in 1999, however was properly used only by 2002. Web 2.0 is said to simply be a more updated term of use for WWW.

To understand what Web 2.0 is, a people concluded, in a conference, that Web 2.0 is as follows:

Web 1.0

Double Click
Ofoto
Akamai
mp3.com
Britannica Online
Evite

Web 2.0

Google Adsense
Flickr
BitTorrent
Napster
Wikipedia
Blogging