Web 2.0 basically refers to the transition from static HTML Web pages to a more dynamic Web that is more organized and is based on serving Web applications to users. Other improved functionality of Web 2.0 includes open communication with an emphasis on Web-based communities of users, and more open sharing of information.
The web 2.0 / Web2 sites are a new generation of websites which are established to let people to share information online in the form of webpages which was not possible before.
Web 2.0 is the term given to describe a second generation of the World Wide Web that is focused on the ability for people to collaborate and share information online. Web 2.0 basically refers to the transition from static HTML Web pages to a more dynamic Web that is more organized and is based on serving Web applications to users.
The term web 2.0 is used to refer to a new generation of websites that are supposed to let people collaborate and share information online in ways that were not possible before. With web 1.0, most websites consisted of static HTML pages. Later on, developers began to create web pages dynamically by retrieving information from a database and using a programming language to build pages from this information on the fly. With web 2.0 websites are not only dynamic, but also highly interactive.
Web 2.0 submission is the technique of submitting your website to different social networking sites with good content. This helps produce instant traffic to your site.
A Web 2.0 site 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 websites where people are limited to the passive viewing of content.
Wordpress.com
Weebly.com
Webs.com
Blogspot.com
Here is really great collection of web 2.0 sites and it is one kind of website or blog which you should manage or maintain.