The Google Assistant wants to be your co-pilot - earlier this year it landed on Android Auto, now it's rolling out to Google Maps for Android as well. It seems that this feature is enabled for some (but not all) users who have updated to version 10.4.1 of Maps. To summon the Assistant you either use the "Hey, Google" hot word or tap on the microphone. In either case, an unobtrusive panel slides up from the bottom. Any actions won't cover up the map - e.g. starting a call or sending a message keeps the dialer and messaging apps in the background so you always have a clear view of the...
Source: https://www.gsmarena.com/google_assistant_now_has_a_less_obtrusive_ui_in_google_maps-news-34521.php