The bodyweight squat is a leg strengthening exercise that only uses bodyweight as the resistance. It is mainly used in beginner workouts, warm-ups, endurance workouts, and to teach squat form. Before doing squats with weight, you should be able to do the bodyweight squat efficiently.
When performing a squat first you bend at the hips. The majority of your weight should be focused into your heels. Squat down until your hips are below your knees while keeping your chest facing outward. You can stick your arms forward to use them as a counter balance.