How does the active lane assist feature work in the Audi A7?

I'm considering buying an Audi A7 and I've heard about the active lane assist feature. Can you explain how it works and if it's worth investing in?

The active lane assist feature uses cameras to monitor the lane markings on the road and can gently steer the car to keep it within the lane. It also provides warnings if you start to drift out of your lane. It's definitely worth investing in as it adds an extra layer of safety and can reduce driver fatigue on long trips.

I've found the active lane assist feature to be very helpful in keeping me centered in my lane, especially on highways where I tend to get distracted. However, it's important to still pay attention to the road and not solely rely on the feature.