Battleground editor usefulness?

[AMF]

Ok, noobie question hour again.

I just noticed, and played with, the battleground editor.

What practical function does it have? Is it just for fun? Or do the terrain effects (roughness, trees, etc) actually have an effect on a battle? And how do I get them to be used for battles that may occur? Do I need to give them specific filenames and load them into the game somehow?

Thanks in advance...