It does once the dog knows what the 'click' means but first you have to teach the dog that a 'click' means he/she is getting a treat. Thats what Kiz means by charging the clicker, once the dog understands this then you can click when the dog does what you want and they know a treat will follow.
'The click itself has a positive association in the dogs mind because we have correctly set it up with food rewards.'quoteyep.....we have 'charged it'