How does the Audi A4's turbo engine enhance its performance?

I've heard that the Audi A4 has a turbocharged engine, but I'm not sure how it affects the car's performance. Can you explain its purpose and benefits?

The turbocharged engine in the Audi A4 is designed to increase power and efficiency. By using exhaust gases to power the turbine, the turbocharger forces more air into the engine for increased combustion, resulting in a higher horsepower output.