What is the purpose of Audi A5's Variable Intake System?

I've heard about the Variable Intake System in Audi A5 and was wondering what it is used for and how it affects the car's performance.

The Variable Intake System in Audi A5 is designed to optimize engine performance at different RPMs by adjusting the length of the intake manifold. In simple terms, it helps improve the engine's torque and power output.

The Variable Intake System in Audi A5 makes use of a variable length runner system to optimize the air intake for better performance. It results in improved fuel economy and engine power.