What is web 2.0?

the answer above is great and technical.


But, in summary web 2.0 is the revolution at internet services.


The news services includes social bookmarking (like Yahoo! My Web 2.0: myweb2.search.yahoo.com), RSS distribution (like My Yahoo!: my.yahoo.com), blog and other people connection ways (like Yahoo! 360°: 360.yahoo.com), ajax and online softwares (like Windows Live: www.live.com or ideas.live.com) and other web services revolutions

What is web 2.0?
How about "an overly hyped marketing term that doesn't really mean much of anything?" :P Report It

Reply:Wikipedia has the answers:





The term "Web 2.0" refers to a second phase of development of the World Wide Web, including its architecture and its applications.





As used by its proponents, the phrase refers to one or more of the following:-





* a transition of websites from isolated information silos to sources of content and functionality, thus becoming a computing platform serving web applications to end users


* a social phenomenon referring to an approach to creating and distributing Web content itself, characterised by open communication, decentralization of authority, freedom to share and re-use, and "the market as a conversation"


* a more organized and categorized content, with a more developed deeplinking web architecture.


* a shift in economic value of the web, potentially equalling that of the dot com boom of the late 1990s.





However, a consensus upon its exact meaning has not yet been reached. Skeptics argue that the term is essentially meaningless, or that it means whatever its proponents decide that they want it to mean in order to convince the media and investors that they are creating something fundamentally new, rather than continuing to develop and use well-established technologies.





Many recently developed concepts and technologies are seen as contributing to Web 2.0, including weblogs, wikis, podcasts, RSS feeds and other forms of many to many publishing; social software, web APIs, web standards, online web services, Ajax, and others.





Web 2.0 differs from early web development (retroactively labeled Web 1.0) as it is a move away from websites, email, using search engines and surfing from one website to the next. Others are more skeptical that such basic concepts can be superceded in any real way by those listed above.
Reply:it is a new way in offering services in the web.





see a lot of web 2.0 applications to see the differences.





http://wwwhatsnew.blogspot.com