Google officially launched its newest features in their search engine, Knowledge Graph. With this feature you will get search results more content-rich, interactive, and more detail. Why is richer? By Knowledge Graph you will find a more diverse content. And this will be more interactive content because Google will explain the details.
Let's say you search on Google search engine with keywords "Vincent Van Gough". On page result later, Google will provide more detail than usual. In search pages later, on the right side of search results, you will find information about "Vincent Van Gough" from several angles.
Let's say "Vincent Van Gough" associated with the figure (person), books, sites, or products. If the related person, Knowledge Graph will show more detailed information.