Web 2.0 and Current SEO

[Yuga]

Web 2.0 link building is a form of link building where you sign up at sites that are typically but not limited to social micro-blogging sites.

[Lishmalinyjames]

Web 2.0 is the term used to describe a variety of web sites and applications that allow anyone to create and share online information or material they have created. There is a number of different types of web 2.0 applications including wikis, blogs, social networking, folksonomies, podcasting & content hosting services.