Semi noob here.
So I’ve discovered the asset browser and now playing with downloaded materials.
I’m guessing one can only apply materials from there whilst in Object Mode? 'and not Edit Mode?
If so, then the only way to apply materials in Edit mode is by creating new ones?
Been searching high and low and not finding much on this. Unless I’m searching wrong or it’s widely understood as being the way things work.
Much obliged for any guidance.
IMO you should create a proxy like a cube to drop your material onto, then with your original object, go into the materials panel, add a new material slot, then in edit mode assign the faces you want to have that material to that slot, then choose the material you want from the dropdown list.
Aaaaah, thank you!
It’d occurred to me to do that but it wasn’t working.
Realize I was doing it the wrong way after seeing your suggestion.
Has to be dragged onto a New Material one has created.
Didn’t think to do that before. Again, THANK YOU! 
Thanks for replying. Will attempt your method as well.
Cheers.
