What is the purpose of the Audi 80's quattro permanent all-wheel drive?

I'm trying to understand the mechanics and benefits of the quattro permanent all-wheel drive system in the Audi 80 and what makes it unique compared to other all-wheel drive systems.

The quattro permanent all-wheel drive system in the Audi 80 distributes power between the front and rear wheels in a 50:50 ratio, providing better grip and traction on all types of terrain and weather conditions.

The quattro permanent all-wheel drive system in the Audi 80 uses a central differential to distribute power to each individual wheel, allowing for better handling and cornering performance.