It gives the target priority in the next turn. Is this move useful for anything? I've been trying to think of situations but it just seems like you're just wasting a turn.
For example, if you use it on the opponent you could utilise a move like Payback which doubles power. But then you could just use Payback twice for the same effect.
In double battles you could use it on your team mate, but is there a real advantage to that?