What does the Audi A1's gear shift indicator do?

I noticed a gear shift indicator on my Audi A1's dashboard. What is it for and how does it work?

The gear shift indicator in your Audi A1 displays which gear you should be in for optimal fuel efficiency. It takes into account your current speed and acceleration to suggest the best gear to use.

The gear shift indicator is also useful for new drivers who may not be familiar with when to shift gears. It can provide helpful guidance to ensure smooth and efficient driving.