applications - "Weather is running" notification

Running 8.1.0 on a Moto x4: I keep getting this notification:

Weather is running

Tap for more information or to stop the app.

If I tap and Force Stop the Weather app, it comes back before long.

1. 
   

   How can I really keep the Weather app from running in the background?

   
   


2. 
   

   Or, if I want it to run in the background, how can I prevent this notification from constantly appearing?