They are to either taunt your enemy (draw his attention and attacks to you) or distract him (make him want to go after someone else). I find them to be a waste of time because they do not always work. My Minotaur minion only uses taunt, so the enemies will attack him and leave me alone, but half the time they attack me anyway. Hope that helps.
Thank you all who replied. And if that is all they are good for I will remove them from my deck, I mean come on, I do like to solo but when others are with we are usually helping each other out so..... But, I might just keep the distract and throw it on people that jump in a fight uninvited! (hehe)