In a major update, Google has added several new featured in Android Auto to try to make the usability and driving simpler.
These features can be tried with the media apps supported by Android Auto, including Google Play Books, Google Play Music, iHeartRadio, Spotify etc.

Improvements in Music and media discovery
Finding media has been simplified by bringing content to the forefront of the screen. An improved layout and large media art

Easier to message
Improvements
Apart from SMS, MMS and RCS services are also supported now.

Android Auto can be downloaded from Play Store.