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In short, Netscape focused on creating software, releasing updates and bug fixes, and distributing it to the end users. O'Reilly contrasted this with Google, a company that did not at the time 

focus on producing end-user software, but instead on providing a service based on data such as the links Web page authors make between sites. 

Google exploits this user-generated content to offer Web search based on reputation through its "PageRank" algorithm. 

Unlike software, which undergoes scheduled releases, such services are constantly updated, a process called "the perpetual beta". A similar difference can be seen between the Encyclopædia Britannica Online and Wikipedia: while the Britannica relies upon experts to create articles and releases them periodically in publications, 


Wikipedia relies on trust in (sometimes anonymous) community members to constantly and quickly build content. Wikipedia is not based on expertise but rather an adaptation of the open source software adage "given enough eyeballs, all bugs are shallow", and it produces and updates articles constantly.

 O'Reilly's Web 2.0 conferences have been held every year since 2004, attracting entrepreneurs, large companies, and technology reporters.
 
 
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Writing when Palm Inc. was introducing its first Web-capable personal digital assistant, supporting Web access with WAP, DiNucci saw the Web "fragmenting" into a future that extended beyond the browser/PC combination it was identified with. 

She focused on how the basic information structure and hyperlinking mechanism introduced by HTTP would be used by a variety of devices and platforms. As such, her use of the "2.0" designation refers to a next version of the Web that does not directly relate to the term's current use

Terry Flew, in his 3rd Edition of New Media described what he believed to characterize the differences between Web 1.0 and Web 2.0:

"move from personal websites to blogs and blog site aggregation, 


from publishing to participation, from web content as 


the outcome of large up-front investment 


to an ongoing and interactive process, and from content management systems to links based on tagging (folksonomy)".

Flew believed it to be the above factors that form the basic change in trends that resulted in the onset of the Web 2.0 "craze"

 
 

The term "Web 2.0" was first used in January 1999 by Darcy DiNucci, a consultant on electronic information design (information architecture). In her article, "Fragmented Future", DiNucci writes: 

The Web we know now, which loads into a browser window in essentially static screenfuls, is only an embryo of the Web to come. 


The first glimmerings of Web 2.0 are beginning to appear, and we are just starting to see how that embryo might develop. 


The Web will be understood not as screenfuls of text and graphics but as a transport mechanism, the ether through which interactivity happens. 


It will , appear on your computer screen,   on your TV set ,  your car dashboard ,  your cell phone , hand-held game machines, maybe even your microwave oven

Web 2.0 capabilities were present in the days of Web 1.0 but implemented differently. For example, a Web 1.0 site may have had a guestbook page to publish visitor comments, instead of a comment section at the end of each page. Server performance and bandwidth considerations meant that having a long comments thread on each page could potentially slow down the site-