Defining Terminology 'Web 1.0 and 2.0'

What is Web 1.0 and Web 2.0?

Web 1.0

http://en.wikipedia.org/wiki/Web_1.0

Web 1.0 was an early stage of the conceptual evolution of the World Wide Web, centered around a top-down approach to the use of the web and its user interface. Socially, users could only view webpages but not contribute to the content of the webpages. 

Web 2.0

http://oxforddictionaries.com/definition/english/Web%2B2.0?q=web+2.0

The second stage of development of the Internet, characterized especially by the change from static web pages to dynamic or user-generated content and the growth of social networking.