Why is the Audi A5 equipped with a turbocharger?

I've noticed that the Audi A5 comes with a turbocharged engine. What is the purpose of this feature and how does it affect the car's performance?

The turbocharger allows the engine to generate more power without increasing the overall size of the engine. This makes the car more fuel efficient and also improves its acceleration and performance.

The turbocharger works by compressing air and forcing it into the engine, resulting in more air and fuel being burnt, which in turn generates more power. It's essentially like adding a smaller engine to your existing engine.