"In strength training, the squat is an exercise that trains primarily the muscles of the thighs, hips and buttocks, hamstrings, as well as strengthening the bones, ligaments and insertion of the tendons throughout the lower body. Squats are considered a vital exercise for increasing the strength and size of the legs and buttocks.
Squats are a competitive lift in powerlifting."
3 Videos explaining how to squat heavy weight properly, you don't need more. Work on your form, and you will be able to lift heavy soon!