Came home and my garage door was not closed all the way

I notice I did get a notification that it stopped what exactly does that mean?

There must have been some obstacle that triggered the safety feature of the opener or multiple concurrent commands resulted in door getting reversed or stopped.

The app reports the stopped state when Garadget hasn’t received the door closed confirmation from the sensor within the expected time frame following “close” command. You can restart the attempt from the web app. Recovery from the stopped state is also going to be supported in upcoming mobile app builds.