Shoulders have 3 components :
Anterior Head:
o Function: Flexion, Medial Rotation
o Location: Front portion of the shoulder girdle
o Exercise: Barbell Shoulder Press
Middle Head:
o Function: Abduction
o Location: Middle/Side of the shoulder
o Exercise: Dumbbell Side Laterals
Posterior Head:
o Function: Extension, Lateral Rotation
o Location: Back of the shoulder
o Exercise: Bent Over Dumbbell Rear Delt Raise With Head On Bench
What you can see from the anatomy information above is the shoulder is really made up of 3 different small muscle groups. Many beginners treat the shoulder as one muscle group, and train it like the chest; presses, presses and more presses.
All exercises should be performed in perfect form because bad form or habits that you start now will follow you and will lead to lack of progress or worst off injury in the future.