What does “state transfer” in Representational State Transfer (REST) refer to?

Question

What does the State Transfer in Representational State Transfer refer to?

Found some explanations about this (e.g. here) but I still don\'t understa

Answer 1

The Web is comprised of resources. A resource is any item of interest. For example, theBoeing Aircraft Corp may define a 747 resource. Clients may access that resource with thisURL:http://www.boeing.com/aircraft/747A representation of the resource is returned (e.g., Boeing747.html). The representation places the client application in a state. The result of the client traversing a hyperlink inBoeing747.html is another resource is accessed. The new representation places the client application into yet another state. Thus, the client application changes (transfers) state with each resource representation --> Representational State Transfer!