Web 2.0 is the evolution of the Web towards greater simplicity (requiring no technical knowledge or computer for users) and interactivity (allowing everyone, individually or collectively, to contribute, share and collaborate in various forms). The term “Web 2.0” means all technical, features and uses of the World Wide Web that follow the original form of the web, especially interfaces that allow users with little technical knowledge to adopt new functionality of the web. Thus, users contribute to the exchange of information and can interact (share, exchange, etc.) simply, with both the content and structure of the pages, but also between them, creating this waz the social web. The user is using the tools at its disposal, as an active person on the canvas.
The term “Web 2.0” used by Dale Dougherty in 2003, broadcast by Tim O’Reilly in 2004 and consolidated in 2005 with the position paper “What Is Web 2.0”, was imposed from 2007.
The term “2.0” is now used as a generic term to apply the concept of Web 2.0 to other application domains.
Web 2.0 facilitates interaction between users, crowdsourcing and the creation of rudimentary social networks, which may serve content and exploiting network effects, with or without actual visual and interactive rendering of Web pages. In this sense, Web 2.0 sites act more as points of presence, or web portals, focusing on the user rather than on traditional websites. The evolution of the media allowing to consult the websites, their different formats, refocuses in 2008 on the content rather than on the aspect approach.
The new Web 2.0 templates try to make a graph care, effects, while remaining compatible with the variety of media. In Web 2.0 the Internet becomes an actor in feeding the sites content, such as blogs or wikis collaboratively, with even very rigorous citizen science devices.
2.0 websites allow users to do more than withdraw the information. By increasing what was already possible with Web 1.0, they provide users with new interfaces and new software. Users can now provide information to Web 2.0 sites and have control over some of them.