web 2.0, n.Definitions

Web 2.0 is the age of targeted advertising

Web 2.0 is a monetization of your attention

Web 2.0 is an extractive business model that captures a user's information in exchange for free use of the product

Web 2.0 is a perceived altered state of the world wide web, equivalent to a second generation of a software product, which features social networks, creative commons, wikis and other such sites that encourage user input and information sharing.

Web 2.0 is web 2.0 is the internet where you are the product; where the data you provide is used to sell you things or where your data itself is sold to some third party

Web 2.0 is internet where you get things for free and the provider monetizes your information in return; tracking you, capturing your data everywhere online