Side Lateral Raise or Side Arm Raise is an isolation workout for shoulders. It targets the outer head of deltoid.
Steps:

Stand upright, with your feet about shoulder width apart and arms to your sides. Hold a dumbbell in each hand beside your thighs, with your palms turned toward your body. For beginner, start with [...]

A full balanced set of shoulders can help a guy to appear with broader and thicker chest. As for ladies, a well rounded shoulders will create the illusion of a narrower waist. However, big shoulders do not just appear overnight. One of the recommended workouts for shoulders is Front Dumbbell Raise. [...]