Install Android Oreo for Picture-in-Picture
Picture-in-Picture isn't a new concept but Android Oreo brings it to the Nexus 6P for the first time.
Android TV featured Picture-in-Picture mode on Nougat but Android Oreo finally brings it to Google's Nexus devices.
With Android Oreo on board your device you can now see two applications on your screen at once. For instance, you can take video calls in an app like Google Duo (it'll minimize the app and show the person in a small box) while browsing the web or playing select games.
The windows aren't static. You can also move them around your screen and you can make the window smaller or larger depending on the situation.
The Picture-in-Picture feature doesn't work with every single app but we expect support updates to trickle out as we push away from the release.
Google recently updated Google Maps to work with Picture-in-Picture mode and many more will follow.