A Front Raise primarily works your anterior (front) deltoids, a muscle within your shoulder, which helps to move your arm forwards.
Begin in a standing position with legs shoulder width apart. Hold your dumbbells or kettlebells with your palms facing towards your body and the weights resting lightly on the thighs. From here, lift your arms up in front of you to just above the height of your shoulders and slowly bring them back down.
This exercise is often done wrong. It is important to remain in control of the movement and not to use momentum to get the arms to the desired height. If you feel that you are having to use momentum and add a swing into the movement you should reduce the weight.