Why does the Audi A4 use turbocharged engines?

I've noticed that the Audi A4 often comes with turbocharged engines. What are the advantages of this type of engine and why has Audi chosen to use them in this model?

Turbocharged engines use exhaust gases to increase airflow and improve power output, making them more efficient and powerful overall.

Using a turbocharged engine allows Audi to downsize the engine while maintaining power, resulting in improved fuel efficiency without sacrificing performance.

Turbocharged engines also have lower emissions compared to regular engines, making them better for the environment.