What is Quattro and why is it important for the Audi A4?

I've heard about Quattro in regards to the Audi A4, but I'm not sure what it is and why it's significant for this car. Can you explain it to me?

Quattro is Audi's all-wheel drive system, which is a technology that distributes power to all four wheels of the car. This is important for the Audi A4 because it provides better traction, stability, and handling in various driving conditions.

I've driven both front-wheel drive and all-wheel drive cars, and I can definitely say that Quattro makes a big difference in terms of performance and control. Especially in snowy or wet conditions, the Audi A4 with Quattro will outperform other cars without this feature.