Google Pixel Watch 3
Ending running applications
Some applications aren't ended completely when you return to the home screen. If you don't end them from the list of running applications, they keep running in the background which may slow down your smartwatch.
Step 1 of 3
Press the Side key.
Step 2 of 3
Press and hold the required app.
Step 3 of 3
Press Clear from Recents.