Why is the Audi A2 considered a pioneer in lightweight construction?

I am wondering why the Audi A2 has been praised for its lightweight construction in the automotive industry.

The Audi A2 was ahead of its time with its innovative use of aluminum for the body structure, making it significantly lighter than traditional steel construction methods. This not only improves performance and fuel efficiency, but also reduces the car's environmental impact.

This lightweight construction also allows for more efficient use of space within the car, providing a larger and more comfortable interior despite its compact size. It was a smart design choice for urban drivers.

The Audi A2's lightweight construction also contributes to its impressive handling and agility on the road. It's a joy to drive thanks to its well-balanced weight distribution and nimble handling.