I cannot say often enough how much the proper rhythm irons out your golf swing. Three counts up, one count down, that’s it, for every shot–even putting.
But in the golf swing, this rhythm keeps you from rushing your backswing, so you can get into the proper slot for the downswing. It also keeps you from rushing your downswing.
This rhythm times your swing–so things happen in the right order and at the right moment.
Nothing else you do will help you get a better swing than by making this your go-to fundamental. Work in it every time you go to the range. Work on it at home.
Every good golfer has this rhythm locked into their shot-making. No bad player does. Which one do you want to be?