What is the advantage of the aluminum body in the Audi A2?

I have always heard that aluminum is a better material for car bodies, but why is it specifically chosen for the Audi A2? I want to know the technical details and what benefits it brings to the car.

The use of aluminum in the Audi A2 provides several benefits. Firstly, it is a much lighter material than steel, making the car more fuel-efficient and agile on the road. Additionally, aluminum has a higher strength-to-weight ratio, meaning the car can still maintain its structural integrity despite being lighter. It also has better corrosion resistance, ensuring the car's longevity.