Like Tonuss said, it makes quests much easier where you have to loot 10 bones or whatever.
I use it on another way to make the FastQuest Spam easier to read. My 1st slave has CTLR+1 as keybind on Interact with Target, my second CTRL+2 etcetc...

So i can choose the slave which will loot the targeted corpse. Works very well.