HATEOAS brings the same concepts to RESTful Web Services.
When some details of a resource are requested, you will provide the resource details as well as details of related resources and the possible actions you can perform on the resource. For example, when requesting information about a facebook user, a REST service can return the following
User details Links to get his recent posts Links to get his recent comments Links to retrieve his friend’s list.
Entity extends RepresentationModel with links directly in Controller class
Refrences: https://grapeup.com/blog/how-to-build-hypermedia-api-with-spring-hateoas/#