What causes pulling and extreme vibrating

There could be several reasons this is happening. Tie rods, struts, tires. Most front end shops will inspect for free and let you know. Look at your left tire and see if it is worn more on one side. This is an indicaiton it is out of line. Also, a front end alignment. Hitting a pot hole, curb etc can cause damage by throwing a weight and the tire vibrating and getting the front out of aligment so it drifts to one side.

Could be the rotor is warped and also the caliper piston is not retracting