Web 2.0 simply defines the evolution of the world wide web
The term "Web 2.0" was coined by Darcy DiNucci in 1999
an "Architecture of participation" that encourages users to add value to the application as they use it
Web 2.0 " is commonly associated with web development and web design that facilitates interactive information sharing, interoperability, user-centered design and collaboration on the World Wide Web
Executives say they are using Web 2.0 technologies to communicate with customers and business partners and to encourage collaboration inside the company .
Seventy percent say they are using some combination of these technologies for communicating with their customers. For example, about one-fifth of them say they are using blogs to improve customer service or solicit customer feedback
Characterized by YouTube, Facebook, and MySpace, these sites allow people to upload content such as videos or personal profiles (Microsoft provides the digital advertising technology for Facebook, the second-largest networking site.)
Online journals of commentary and chat, blogs are everywhere on the Web. The corporate world is now using them to subtly market their products or develop a brand image.
are audio programs that can be downloaded and played anytime on an MP3
These "direct-to-consumer" press releases about products or company services can be written with search-friendly terms and then placed with online news sites that index or "aggregate" them and send headlines to subscribers.
5. Targeted advertising
Search-engine advertising — where companies pay to have their Web site displayed on search-engine results — has been big for several years. But now companies can target their ads within the context of what people are reading online.
Tim and other web analysts, a good Web 2.0 site should :
provide services, not just a packaged software, and ensure cost-effective scalability,
be based on unique and hard-to-recreate data sources that get richer as more people use them,
trust users as co-developers,
harness collective intelligence,
leverage the long tail through customer self-service,
be potentially deployable on any device,
provide users with lightweight user interfaces, development models, and business models.
The criticism exists that "Web 2.0" does not represent a new version of the World Wide Web at all, Amazon.com , for instance, has allowed users to write reviews and consumer guides since its launch in
criticism has included the term “a second bubble” (referring to the Dot-com bubble of circa 1995–2001), suggesting that too many Web 2.0 companies attempt to develop the same product with a lack of business models.
Critics have cited the language used to describe the hype cycle of Web 2.0 as an example of Techno-utopianist rhetoric.
Critics such as Andrew Keen argue that Web 2.0 has created a cult of digital narcissism and amateurism