Earlier this year at I/O 2018, Google announced that Assistant was coming to Google Maps. Specifically, a visually compact and less disruptive version would appear when getting directions. This navigation-optimized Google Assistant is now rolling out in Google Maps for Android.
Google Assistant in Google Maps was billed as having a lower visual profile allowing the user an eyes free experience. You can say the “Ok Google” command or tap the multi-colored microphone in the top-right corner to activate it.