Google does not give specific descriptions about entities; all the information we could find is data from experiments, patents, and opinions of Google developers. The main principle of entities is methods that help Google better understand your site’s content. More deeply, several formats help structure data for Google to understand; these are JSON-LD, microdata, and RDFa. They provide a clear outline of the existing information on a web page.
Structured data indicates the type of content on the selected page. It could be a news article, a movie review, a recipe, etc. But the information in the content is very dependent on the web page. That is, if this is a review of a recipe, then the structured data contains ingredients, cooking, or preparation time. The importance of the Google vision web entities is that Google will better understand your website because the information is provided in a detailed format that the search mechanism can understand.
