The Snatch, Hi Pulls and even upright row, all depending on the grip position, are among the ultimate power and mass builders. And have been for generations of lifting. Giving a thickness and depth to the whole upper body. Which a lot of BB'ers don't have when looking at them from the side. Even looking shallow for some guys. Giving pulls serious attention for awhile, you may find yourself buying the next size larger shirts or suit jackets.
Excellent for the whole of the shoulder girdle, which include the traps, all three heads of the delts and even the upper chest. Affecting also the lat's and the whole chain of back muscles, including the hams.
Pulls can be a learning exercise, keep the bar close to the body each rep. Start light if new at this....a regular BB'ing workout can be 3-4x8-10 reps twice a week suggested. Heavier 3x5-6
Good Luck