Web 1.0 focused on commerce while Web 2.0 emphasizes user participation and contribution. The concept of Web 2.0 emerged from a 2004 brainstorming session between O'Reilly and MediaLive International. Key principles of Web 2.0 include customization for unique users, harnessing collective intelligence by allowing users to add value through tagging, reviewing, and editing, and specialized databases to store user-generated content and power applications. Web 2.0 applications are also characterized by perpetual beta cycles and an emphasis on services rather than standalone products.
3. Web 1.0 was Commerce Web 2.0 is People - Ross Mayfield Web 2.0 seems to be like Pink Floyd lyrics: It can mean different things to different people, depending upon the your state of mind. - Kevin Maney
