Android auto is to mirror apps from your android smartphone to the dashboard of your car. Not all cars support android auto only certain cars for example Toyota Yaris, Volkswagen Beetle 2016, Ferrari Portofino 2019, and much more.
Once your phone is connected, your Android apps show up onscreen, just like that. Tap to get driving directions or talk to send a text. Even call your mom, hands-free. Android Auto is made to help you focus on the road. And have fun along the way. Just plugin and go.
In android auto, you also have the google assistant which you can control apps hands-free, get directions from Waze and Google maps, listen to music on Spotify and YouTube Music, and more like viewing your calendar events and reading new on Google News.
Android auto is also similar to Apple's car play. I will leave links below about Android auto.
Android auto: https://www.android.com/intl/en_us/auto/
Compatible cars: https://www.android.com/auto/compatibility/