What is Web 2.0 sites ?
 

Does anyone please let me know what is web 2.0 sites and also let me know how does it work.?

Web 2.0 is the highly recommended method to optimizing the website organic result.

it allow people interact each other, its not static web like my thought

A Web 2.0 website may allow users to interact and collaborate with each other in a social media dialogue as creators of user-generated content in a virtual community, in contrast to the first generation of Web 1.0-era websites where people were limited to the passive viewing of content.

the second phase of improvement of the World Wide Web, described particularly by the change from static pages to element or client produced content and the development of online networking.