The glute hip thrust machine predominently targets the glutes - gluteus maximus, gluteus medius, and the gluteus minimus as well as the hamstrings.
To start, sit yourself down onto the bench, with your feet on the platform about a hip width apart toes slightly pointing out. Lie back, and secure the belt tightly. Grasp the handles tilting upwards to unlock. Put your hands just above your head and grip onto the bench, keeping your head and back against the bench at all times and keeping your feet firmly on the platform. You then thrust upwards squeezing at the top and moving back down in a contious controlled movement. Once finished thrust upwards and lock the by pulling the handles back towards you.