The Google Messages app is compatible with bubble notifications. Your text messages will appear as bubbles that you can drag around the screen.

1. Navigate to and open Settings, and then tap Notifications.
2. Tap Advanced settings, tap Floating notifications, and then choose Bubbles.
3. Next, navigate to and open the Google Messages app.
4. Tap your profile icon on the right, and then tap Messages settings.
5. Tap Bubbles, and then select your desired option. The next time you receive a message, it will appear as a bubble! You can drag the bubble around the screen and tap it when you want to reply.
   

You can also use this feature with the Facebook Messenger app!

1. To begin, navigate to and open Settings, and then tap Notifications.
2. Tap Advanced settings, tap Floating notifications, and then choose Bubbles.
3. Next, navigate to and open the Facebook Messenger app.
4. Tap Menu (the three horizontal lines), then tap the Settings icon, and then swipe to and tap the switch next to Chat heads.
   
   Note: You may be prompted to open your phone's Settings to turn on Chat heads.
   
5. The next time you receive a Facebook message, it will appear as a bubble! You can drag the bubble around the screen and tap it when you want to reply.

Bubble notifications can also be applied to your phone’s apps. You’ll receive new notifications as small icons that can be selected and expanded into a pop-up window.

1. To enable this, navigate to and open Settings, and then tap Notifications.
2. Tap Advanced settings, tap Floating notifications, and then choose Smart pop-up view.
   
3. Next, tap Included apps, and then select the app(s) that will use Smart pop-up view by tapping their switch(es).
   
   Note: Smart pop-up view is only available for apps that support Multi window.
4. The next time you receive a notification from your selected app or apps, it will appear as a pop-up! You can drag the pop-up around the screen and then select it to view the notification.

If a conversation is finished or you no longer want to chat, you can remove the bubble pop-up from your phone’s screen.

Simply touch and hold the bubble icon and then drag it toward the bottom of the screen. An X will appear once you reach the bottom; drag the bubble on top of the X to delete the pop-up. Release your finger when you’re done.