One way to have a “more natural” conversation with Google Assistant is with Google’s “Continued Conversations” feature. Basically, Assistant stays active and listens to you as you ask it follow-up questions. It lessens the need for you to say the trigger word “OK, Google” or “Hey, Google” to ask it follow-up questions. This feature was only available for audio-only Google Home, Home Mini, and Home Max. Now, the current rollout fixes this issue and makes it available in English (US) across all Smart Displays, including the Google Home Hub, Lenovo Smart Display, JBL Link View and LG XBOOM AI ThinQ WK9. You have to head to Settings > Preferences > Continued conversation in the Google assistant app to activate this feature.
Source: The Verge