The bursting of the dot-com bubble in the fall of 2001 marked a turning point for the web. Many people concluded that the web was overhyped, when in fact bubbles and consequent shakeouts appear to be a common feature of all technological revolutions. Shakeouts typically mark the point at which an ascendant technology is ready to take its place at center stage. The pretenders are given the bum's rush, the real success stories show their strength, and there begins to be an understanding of what separates one from the other.

The concept of "Web 2.0" began with a conference brainstorming session between O'Reilly and MediaLive International. Dale Dougherty, web pioneer and O'Reilly VP, noted that far from having "crashed", the web was more important than ever, with exciting new applications and sites popping up with surprising regularity. What's more, the companies that had survived the collapse seemed to have some things in common. Could it be that the dot-com collapse marked some kind of turning point for the web, such that a call to action such as "Web 2.0" might make sense? We agreed that it did, and so the Web 2.0 Conference was born.

According to research papers gathered in wikipedia "Web 2.0" is commonly associated with web development and web design that facilitates interactive information sharing, interoperability, user-centered design[1] and collaboration on the World Wide Web. Examples of Web 2.0 include web-based communities, hosted services, web applications, social-networking sites, video-sharing sites, wikis, blogs, mashups and folksonomies. A Web 2.0 site allows its users to interact with other users or to change website content, in contrast to non-interactive websites where users are limited to the passive viewing of information that is provided to them.

http://en.wikipedia.org/wiki/Web_2.0

http://oreilly.com/web2/archive/what-is-web-20.html

SteveJB:

I agree with the above points. In addition to the above (and imho,) every website that provides an RSS feed can be categorized as a Web 2.0 site even if the website doesn't appear as a Web 2.0 website.

Now that web platform APIs are available on more and more mainstream websites, the major benefits would be seen for websites focussing on newer Web 3.0 features such as implementing Facebook Connect or Twitter Oauth log in and registration.

While the most noticeable difference between a web 1.0 and a web 2.0 is the visuals (rounded corners, mirrored images etc.) web 3.0 is less of a update visually and more of an update in terms of  information sharing between multiple websites. Easier website log ins, personal information automatically uploaded from another website into one's profile makes registration on a website far easier.

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