The bar is placed on the meat of the upper back, directly below the neck. The feet are placed a little further than shoulder width apart and toes pointing straight ahead or slightly out.
Keep the elbows underneath the bar, bend the knees and push the hips back when lowering the weight. Keep the knees tracking in line with the toes and prevent the knees from traveling over the toes.
The ideal depth is to have the thighs parallel to the ground. In this position, keep the abs very tight to hold the spine in a neuteral position.
Press the feet into the ground, push the chest up and squeeze the glutes to end up in the same set up position.