Web 3.0 is one of the terms used to describe the evolutionary stage of the Web that follows Web 2.0. It has been introduced to hypothesize about a future wave of Internet innovation. Web 3.0 was a term coined by John Markoff of the New York Times in 2006. He has referred Web 3.0 as the third generation of Internet-based services that collectively comprise what might be called ‘the intelligent Web’. A web service that uses semantic web, microformats, natural language search, data-mining, machine learning, recommendation agents, and artificial intelligence technologies. All of such is to emphasize machine-facilitated understanding of information in order to provide a more productive and intuitive user experience.
An example is a situation wherein you plan of going to a theatre, find out the movies showing in the theatre, know the reviews and rating of the movies. You would also want to eat in a Japanese restaurant before watching the movie. Instead of giving you multiple searches, you may just type a complex sentence or two in your Web 3.0 browser and all the information you need will be provided by the web. Web 3.0 will analyze your response, search the internet for matching results and organize the results for you.
Web 3.0 is referred also as the Semantic Web. It is a gradual change of the World Wide Web where in semantics of information and services on the web are defined. With Web 3.0, web is able to understand and satisfy the requests of people and machines to the use of web content.