Shock Absorbers serve three main purposes. They act as one of the main joints that keep your vehicle’s wheels firmly planted on the ground, they control the movement of the other parts of your suspension, and they convert kinetic energy into heat. This kinetic energy hits the vehicle when one of its wheels travels over a rough part of the road. The shock absorber uses a system of pistons and oil to absorb this energy and convert it to heat which is then released into the atmosphere. For the driver, this means that the shock normally placed on them while driving over rough surfaces is significantly lessened.