Explain about Google Knowledge Graph?

Google launched a significant endeavour in 2012 called the Knowledge Graph to assist consumers in finding solutions to their problems without ever leaving Google in favour of external websites. In other words, the Knowledge Graph would make it possible for you to find the answer to your query on Google.com rather than visiting a Wikipedia article about the subject.

The knowledge graph "allows you to search for things, people, or places that Google knows about — landmarks, celebrities, cities, sports teams, buildings, geographical features, movies, celestial objects, works of art, and more — and instantly get information that's relevant to your query," according to a post on Google's official blog.