While this system retains shock absorbers, traditional springs have been replaced by four air springs, one on each wheel. An on-board air compressor, fed by sensors, continually adjusts the amount of air in the springs. As you can imagine, this can make for a very smooth ride, like you're floating on air. Shock Absorbers, the Sequel Shocks are a little less involved than springs. Because they have a very specific job to do, their design parameters are fairly narrow.
Most shocks do the same thing, in the same way, only with different fluids.
Aside from traditional shocks, we have MacPherson struts, gas shocks, and air shocks. It works like this. When a vehicle hits a bump, it compresses the spring. The spring's resistance keeps the axle from hitting the bottom of the frame. The inside of a shock absorber resembles a cylinder and piston arrangement in an internal combustion engine.