Dogs are making the association between the click and the treat. Meaning they hear the click and know a treat is coming, so click = good. When you first start clicker training, every correct behavior or trick should be clicked and then treated. Gradually, which is what I think you were asking, you will still click for every correct behavior (dog is thinking click = good), and you can just give a treat at the end of the entire string of tricks. You still need to click after each trick even when not treating each trick individually because the click is what is reinforcing the correct behavior. Hope that helps!
For instance, sit, down, rollover, assuming they are all established tricks in a string. I would do sit *click*, down *click*, rollover *click**treat*.