Training is very important if you have or are thinking of getting a Pitbull. Generally Pitbulls aren’t a dominant breed. This means that you don’t have to “show them who’s boss”, because they always strive to please their owner. Pitbulls are not like some other breeds that will challenge family members for dominance.
Pitbulls are sensitive emotionally. I will tell you from personal experience that spanking or physical correction does not work with Pitbulls because they have such an incredible tolerance to pain.
To really cause them any pain you would have to use force so extreme it would be horribly cruel. This also rules out “training collars” or other pain correction devices. I also advise you to not put a heavy chain-like collar on your Pitbull. Some Pitbull owners think this builds strength and makes them look cool but it can damage their spine. Just use regular flat buckle collars.