This blog is about a fundamental shift in the thinking of what search is supposed to do. It looks at what people do with search and builds this knowledge in the results delivered for a query. No longer is search about providing a single unique answer to every unique individual, it is now about deliver a rich layer of relevant information and knowledge in a format that suites the user. See our blog here >>>>

You may also read the Google Blog for full details at the link below

›› http://www.google.com/insidesearch/features/search/knowledge.html