Web 2.0 are Web sites, which began to arise after 2001. They are based on user-generated content of the particular service.
Web 2.0 is not a new World Wide Web or the Internet (despite the version numbering), but it is another way to use already existing web resources. It is widely noted that Web 2.0 sites change the way of perception of the interaction between the owners of the site and its users, giving at the same time Internet users the opportunity to create the majority of the content posted on Web 2.0 content.
Web 2.0 way of functioning had a significant impact on the development of many web applications, social networking sites and the blogosphere. It helped, among others to popularize Internet services based on the mechanism of blog and wiki.
Web 2.0 pages often use new technologies, including AJAX, SOAP, XHTML, RDF, XUL, RSS and Atom channels. They also promote networking services.
Web 2.0 features can be divided into:
The name of the Web 2.0 was spread in 2004 by O `Reilly Media and MediaLive International companies. The creators of these websites wanted the World Wide Web gave to Internet users the greatest possible of integration and interaction and allow for the use of personalized site for Internet users around the world. In the functioning of Web 2.0 Internet users are the most important, because it is them who provide the entire content of the website (including photos, links, videos) they also create, cooperating with each other, the community of users.
Web 2.0 is often referred to as a "dynamic" service because of the large interaction between the members of the community. Users can build a network of contacts, invite friends, send private messages, and make use of more efficient information flew held by discussion groups and forums.
The first online communities was created at the beginning of the twenty-first century in the United States. They were tribe.net and friendster.com, then MySpace. In Poland, they appeared in 2004 (the first was grono.net) and since then they have developed at a fast rate. Today Web 2.0 dominated the net and pushed the so-called static portals into the background.
Web 2.0 websites allow to carry entertainment and professional goals of their users, they also allow to the exchange experiences and cooperate between each other. In addition, the cost of creating and maintaining Web 2.0 portals are fairly cheap, and the time of their formation is short. It can be argued that they are a new stage in the history of the global networking and the next generation of websites.