A shock absorber is a device used to dampen the bumps and rough spots in the road. There are various types including pneumatic (gas filled), magnetic, hydraulic (liquid filled), and some also add springs.
The shock absorber will absorb the vibrations caused while driving. When a car is in motion, you can feel the vibration from the tires throughout the car. A shock absorber can take that energy and smooth out the ride.
To make sure your ride stays comfortable for the passengers, different cars use different types of shocks. A sports car will absorb bumps differently than a luxury sedan.
Maintaining your shock is a matter of noticing when they no longer work well. Damage could occur if your shocks don’t absorb a bump, making your car touch the ground or bottom out.