It's an old term that dates back to when the policies were created to fill gaps left by ocean marine policies, namely when the insured property was not on an ocean. (effectivecoverage.com)
Renters insurance can also fill gaps left by your other policies, like your Auto insurance. (farmers.com)
The firm gave active listening this rating because it believes active listening can cover gaps left in other workplace areas. (careerbuilder.com)