This release does not have a Play Store Description, so we grabbed one from version 3.1.5810:

Android Auto is your smart driving companion. With a simplified interface, large buttons, and powerful voice actions, Android Auto is designed to make it easier to use apps from your phone while you’re on the road.
Just say “Ok Google” to...

• Route to your next destination using Google Maps with real-time GPS navigation and traffic alerts
• Make calls using Google Assistant and answer incoming calls with just a tap.
• Listen to your favorite media apps including Spotify, Pandora, iHeartRadio, Google Play Music, Amazon Music, NPR One, Audible, MLB.com, and Deezer. Many more music, radio, news, sports news, audiobook, and podcast apps are also supported.
• Send and receive messages with your Google Assistant using SMS, Hangouts, WhatsApp, Skype, Telegram, WeChat, Kik, Google Allo, and many more messaging apps.

For a full list of compatible apps, go to g.co/androidauto

To use Android Auto, you’ll need a phone running Android 5.0 or higher (Lollipop, Marshmallow, Nougat, or Oreo) and an active data connection.
Over 400 car models now support Android Auto! To find out if your car display is compatible and how to enable it, check your owner’s manual or contact your car’s manufacturer. Once enabled, use a high quality USB cable to connect your phone to your car, then launch Android Auto to get going!
Learn more about Android Auto and compatible cars at android.com/auto
For support: support.google.com/androidauto
Get help from our community: productforums.google.com/forum/#!forum/android-auto