How to use the simple mask and mask edit nodes?

[Gyramuur]

It seems that masking allows you to use a model as a "mask". However, what I do not understand is what that actually means or what it functionally does.

I notice in the mask edit node that there is a field to type in layers. Does this allow you to take tags from one model and effectively put them into the other? How does that work?

Do I plug in the model I want to use into the simple masker, then that into mask edit, then type in the tags I want to keep separated by commas to the layers field?

What do I do with the other parameters after the fact? Like what do "arg_one" and "arg_two" do? Also, do I set operation to "true" if I want to merge in those tags?

Or am I misunderstanding how these nodes work?