This might be an elementary question, so apologies in advance.
But after reading the reference on the background setting, compounded with never really seeing anyone use it, I'm a bit confused about it.
To me, the explanation of it in the reference is non-specific and obfuscated.
So hopefully someone can clear this up for me :)
* In more "human" terms, what does it do?
* When is it a good time to use it?
* When is a bad time to use it?
* What are the possible benefits?
* What are the negetive effects?