Those are maps used by substances if you want to create your materials inside CC/iClone.
Applying multiple materials by a Color ID map for instance, painting object edges if Curvature map is present... etc.
It can be used in CC for cloth or accessories. And in iClone while utilizing various substance tools.
Some of the resource maps are applied to all 3D block props by default.
I do not think there is a modern tutorial on the subject, but this one is
older tutorial for iClone 7And this is
for CC 2.0 which should be applicable to current version as well but with different interface:

There maybe more tutorials on RL channel if you search for "substance".