What is Audi A7's head-up display (HUD)?

I am interested in getting the Audi A7, but I am not familiar with the head-up display feature. Can someone explain what it is and how it works?

The head-up display in the Audi A7 is a transparent display that projects important information onto the windshield, allowing you to see it without taking your eyes off the road. It presents information such as speed, navigation, and warnings from driver assistance systems.

The HUD in the Audi A7 uses a high-resolution LCD screen and mirrors to project the information onto the windshield. It can be adjusted to your height and preferred position and provides a clear view even in bright sunlight.