Why does the Audi A8 feature adaptive air suspension?

I noticed that the Audi A8 has adaptive air suspension, but I'm not sure what that does exactly. Can you explain its function and benefits?

The adaptive air suspension in the Audi A8 allows the vehicle's ride height to be adjusted based on the driving conditions and terrain. This means that the car can automatically lower itself for better aerodynamics and fuel efficiency at higher speeds, or raise itself for more ground clearance in rougher terrain.