If a new car offers HD Radio, it means it’s a richer type of radio in 2 ways:

1 – the sound is digital, so it’s less noisy than analog FM

2 – it allows the radio station to transmit both audio and data

See how much information is on the screen?

How to contact the station via text or Twitter.  Then the screen refreshes, and shows the artist and song name that’s currently playing.

Many auto manufacturers offer HD Radio as an audio upgrade in new cars.

Example – the above screen is in a 2016 Mazda3 in which HD Radio comes standard, second trim (GX) and up.