https://thenextweb.com/apps/2020/10/08/google-assistants-new-guest-mode-is-incognito-mode-for-your-voice-commands/

Google announced today that it’s introducing a new Guest Mode in the Google Assistant to pause recording your conversations. This is essentially an “incognito” mode which won’t record any of your queries.

While this use case might be useful for queries you don’t want the company to record, it can also come in handy when you have friends over at your house and they are yelling from different directions, asking the smart speaker to play the song of your choice.