What is the purpose of the Audi A3 Sportback's aluminum monocoque?

I heard that the Audi A3 Sportback has an aluminum monocoque, but what exactly does it do for the car's performance and handling?

The aluminum monocoque in the Audi A3 Sportback provides a lightweight and rigid chassis, which ultimately improves the car's overall performance and handling on the road.

The aluminum monocoque is an essential part of the Audi A3 Sportback's design, as it gives the car a sturdier and more responsive driving experience.

With the aluminum monocoque, the Audi A3 Sportback is able to cut down on weight and increase its structural rigidity, resulting in better fuel efficiency and a more dynamic driving feel.