Better mobility for overhead position. The point of this movement is to create better range of motion while maintaining proper torque and tension in any overhead position (from presses to snatches). We want to ensure that you maintain Internal torque meaning creating tension in the lat, chest, and short head of the bicep. If you are feeling your traps overly or experience shoulder pain you may very well be creating improper torque therefore cheating your true mobility. Always remember it is not what you do but how you do it. Take your time and perfect the mobility of the shoulders.