Web 2.0 is the name given to the new generation of World Wide Web technology and web design. Mainly web 2.0 refers to enhance creativity, information sharing and above all this, collaboration among users. Therefore we can say users collaboration and information sharing, had given rise to this second generation of WWW.
The concept of “Web 2.0″ began with a conference brainstorming session between O’Reilly and Media Live International. Dale Dougherty, web pioneer and O’Reilly VP, noted that far from having “crashed”, the web was more important than ever, with exciting new applications and sites popping up with surprising regularity. What’s more, the companies that had survived the collapse seemed to have some things in common. Could it be that the dot-com collapse marked some kind of turning point for the web, such that a call to action such as “Web 2.0″ might make sense? We agreed that it did, and so the Web 2.0 Conference was born.

This article is an attempt to clarify just what we mean by Web 2.0.
In our initial brainstorming, we formulated our sense of Web 2.0 by example:
Web 1.0 Web 2.0
DoubleClick –> Google Ad Sense
Ofoto –> Flickr
Akamai –> Bit Torrent
mp3.com –> Napster
Britannica Online –> Wikipedia
personal websites –> blogging
evite –> upcoming.org and EVDB
domain name speculation –> search engine optimization
page views –> cost per click
screen scraping –> web services
publishing –> participation
content management systems –> wikis
directories (taxonomy) –> tagging (”folksonomy”)
stickiness –> syndication
The list went on and on. But what was it that made us identify one application or approach as “Web 1.0″ and another as “Web 2.0″? (The question is particularly urgent because the Web 2.0 meme has become so widespread that companies are now pasting it on as a marketing buzzword, with no real understanding of just what it means. The question is particularly difficult because many of those buzzword-addicted startups are definitely not Web 2.0, while some of the applications we identified as Web 2.0, like Napster and Bit Torrent, are not even properly web applications!) We began trying to tease out the principles that are demonstrated in one way or another by the success stories of web 1.0 and by the most interesting of the new applications.
So What this new generation of World Wide Web offers to users:
1. The Web As Platform
2. Harnessing Collective Intelligence
3. Data is the Next Intel Inside
4. End of the Software Release Cycle
5. Lightweight Programming Models
6. Software Above the Level of a Single Device
7. Rich User Experiences
These seven offerings are coined as seven principal features of web 2.0
These principals are given in the rise to a completely new world of World Wide Web.