Web 2.0" refers to what was perceived as a second generation of web development and web design.

It is characterised as facilitating communication, information sharing, interoperability, and collaboration on the World Wide Web. It has led to the development and evolution of web-based communities, hosted services, and web applications. Examples include social-networking sites, video-sharing sites, wikis, blogs and folksonomies.

This is a new way to communicate and opens up a new horizon for letting people know what other people think. Web surfers may get more than just the music, videos and news updates they were looking for when they log onto trendy next-generation sites such as Last.fm, YouTube and Digg. It’s human nature. "If I know a lot of people have chosen a particular video, I also want to experience that."

The sometimes complex and continually evolving technology infrastructure of Web 2.0 includes server-software, content-syndication, messaging-protocols, standards-oriented browsers with plugins and extensions, and various client-applications. The differing, yet complementary approaches of such elements provide Web 2.0 sites with information-storage, creation, and dissemination challenges and capabilities that go beyond what the public formerly expected in the environment of the so-called "Web 1.0".

Web 2.0 websites typically include some of the following features/techniques.

• Search -The ease of finding information through keyword search.
• Links - Ad-hoc guides to other relevant information.
• Authoring - The ability to create constantly updating content over a platform that is shifted from being the creation of a few to being constantly updated, interlinked work. In wikis, the content is iterative in the sense that users undo and redo each other's work. In blogs, content is cumulative in that posts and comments of individuals are accumulated over time.
• Tags - Categorization of content by creating tags: simple, one-word user-determined descriptions to facilitate searching and avoid rigid, pre-made categories.
• Extensions - Powerful algorithms that leverage the Web as an application platform as well as a document server.
• Signals - The use of RSS technology to rapidly notify users of content changes.

Web 2.0" refers to what was perceived as a second generation of web development and web design.

It is characterised as facilitating communication, information sharing, interoperability, and collaboration on the World Wide Web. It has led to the development and evolution of web-based communities, hosted services, and web applications. Examples include social-networking sites, video-sharing sites, wikis, blogs and folksonomies.

This is a new way to communicate and opens up a new horizon for letting people know what other people think. Web surfers may get more than just the music, videos and news updates they were looking for when they log onto trendy next-generation sites such as Last.fm, YouTube and Digg. It’s human nature. "If I know a lot of people have chosen a particular video, I also want to experience that."

The sometimes complex and continually evolving technology infrastructure of Web 2.0 includes server-software, content-syndication, messaging-protocols, standards-oriented browsers with plugins and extensions, and various client-applications. The differing, yet complementary approaches of such elements provide Web 2.0 sites with information-storage, creation, and dissemination challenges and capabilities that go beyond what the public formerly expected in the environment of the so-called "Web 1.0".

Web 2.0 websites typically include some of the following features/techniques.

• Search -The ease of finding information through keyword search.
• Links - Ad-hoc guides to other relevant information.
• Authoring - The ability to create constantly updating content over a platform that is shifted from being the creation of a few to being constantly updated, interlinked work. In wikis, the content is iterative in the sense that users undo and redo each other's work. In blogs, content is cumulative in that posts and comments of individuals are accumulated over time.
• Tags - Categorization of content by creating tags: simple, one-word user-determined descriptions to facilitate searching and avoid rigid, pre-made categories.
• Extensions - Powerful algorithms that leverage the Web as an application platform as well as a document server.
• Signals - The use of RSS technology to rapidly notify users of content changes.