While a 30 day squat challenge is a great way to challenge yourself, you shouldn't do the same squat exercise everyday. Doing different squats target your glutes from multiple angles and shape the perfect butt.
PROPER SQUATS : Bring your toes to the wall, almost touching, then sit down. Stay looking straight so you learn to keep your torso up. Sit as low as you can go then hold the seated position for seconds and repeat. Great for butt, legs, and core.