Google is making Duo more useful as it's rolling out group video calls to everyone on Android and iOS. You can have up to eight people on a call at once (a far lower limits than FaceTime's 32 and Skype's 50). Group calls gradually went live in some markets this month, but now they'll be available for everyone.
There's also a data saving mode for mobile data networks and WiFi on Android in certain markets, including Brazil, India and Indonesia. Google says when it's active, both you and the person you're calling will save data. The feature will arrive in more regions in the coming months.
In addition, Google is letting you spice up your video voicemails. On Android (and soon on iOS), you can add text, emojis and doodles to your messages.