Google says you can also use the feature to have Assistant broadcast to your speakers when you're not at home.
Broadcast sends your voice to all other Assistant-enabled speakers in your home.
Let us know if you're going to try this, or stick to text messaging your family for announcements (what a sad but convenient time we live in!). And now, your Google Assistant is getting in on the game. To ensure that broadcasting works across all your devices, make sure you're signed in with the same Google Account.
Last month, Google announced that users with Google Assistant would be able to broadcast messages via Google Home devices, and now that time is here. For instance, "Ok Google, broadcast it's dinner time" will play a virtual dinner bell through your network of speakers, including the one used to send that message.