Stand shoulder width, then hinge and bend to lower yourself down.
Extend the hips and knees to straighten your body.
Slowly lower back down to the start position and repeat.
Rounding the back.
Hyperextending the hips.
Rushing repetitions.
Stand at roughly shoulder width with your feet pointing slightly outwards with the bar over the mid foot. Hinge at the hips and bend your knees slightly to lower yourself. Grip the bar with both hands using an overhand grip at slightly wider than shoulder width.
With your arms fully extended, start by driving through the heels to extend the knees. Then push the hips forward and squeeze your glutes to stand straight. Then in a controlled manner lower the bar back down by hinging the hips and bending the knees to the start position. Keep the bar path close to your body as you stand straight. Tense your core and maintain square shoulders to keep a straight back throughout. Repeat for the desired amount of repetitions.
Avoid rounding your back or hyperextending when straightening the hips.