A car's suspension has two key functions. First off, it's there to ensure optimal handling by keeping your car's tires stuck on the ground. Thus, making sure that the ideal amount of grip and traction can be attained at all times. This allows your car to handle better, as well as permitting the most amount of power and torque from the driven wheels onto the ground. Secondly, the suspension also dampens your car against the impact on the road. Hence, ensuring that your car doesn't jolt around too much, and in doing so, allows you to ride more comfortably.