Yes, this is a good point you raise. And I can see how this might create confusion.
This nomenclature, whilst it’s talked about every so often on Meta, especially by developers (as its referenced a lot in code), is missing from Discourse New User Guide and something that is only picked up upon by new people if they engage in discussions specifically related to that functionality.
@JammyDodger do we need to think about addressing that in that guide? Where does someone learn about “Discovery” routes?