Searching is been class act of learning basic human need as well as broaden mental state of users. The above principle is absolutely true and it’s applicable in every sphere of human life. ‘Google’ the leading search engine strictly follow searching principle. Regarding this, it introduces relatively new applications time & again, to ease up online searching act.
At present, Google inducts a valuable searching explanation feature, which could provide explanations for searching particles. As you know, when user prompts to search anything else, lots of related answers are displayed by search engine. Such scenario creates doubt in human mind as which one it true or not be true. To resolve such matter Google discovered Knowledge Graph and Search Explanation as well. The explanations feature does come into act during Google searching. Whenever users hover their mouse pointer on thumbnail, the explanation feature display how someone connected to particular subject. Certainly explanations feature of Google Search is master stroke after introduction of Knowledge Graph.
For more information: Inside Search Blog