Delay is used to add a time delay to a device operation. For example you might want to turn a light off 2 minutes after it turned on. Or you might want to extend the time a device is in a particular state. All time is valued in seconds but can be a math equation, so 300 seconds could be 5*60 seconds.
Set a delay of 10 seconds after a MOTION device sends a STILL command until it the state actually changes to STILL.