What is an HTTPbasedREST service?

Question

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Colleagues, good time of day!
Tell me , please, what kind of beast is this HTTPbasedREST-service ? How is it implemented and presented to the user? Ran into it in the following context ... authentication is implemented based on OAuth 2.0. For the user, the functionality is available as an HTTPbasedREST-service . ...
I'm leafing through manuals and articles from the Web, but honestly, it's still porridge in my head = (
Thanks in advance for your answer!

Answer 1

Apparently, they wanted to emphasize that REST happens not only over HTTP.
You are talking about a regular HTTP REST service, of which there are thousands.
A user with a probability tending to 100% means an application (javascript, mobile, desktop - no difference).
You need, for example, to get a list of any objects in JSON format, you make a GET request to the API at api.my-rest-service.com/objects.json
anything interesting, like Last-Modified, ETag).
That's all, in fact.
And where exactly to call, with what parameters, what types of requests - this should be written in your documentation (or terms of reference, if you are writing the service yourself).