What is the purpose of the electronic differential lock (EDL) in the Audi A3?

I am curious about the true purpose and function of the EDL in the Audi A3. I have read conflicting information and would like a clear explanation.

The electronic differential lock (EDL) in the Audi A3 is a feature that helps improve traction and stability while driving. It works by regulating the power to each wheel independently, allowing for better control on slippery surfaces.

In simple terms, the EDL monitors the wheel speed and applies the brakes to the wheels that are spinning too fast, redistributing the power to the other wheels for better grip. This feature is especially helpful in snowy or wet conditions.