Protect your pool
There are many reasons to cover a pool. It could be for winterizing, or just for when cooler weather and other activities take precedence. It may be that the pool is seldom used, and covering it will keep the debris out and the heat in. It may be for safety reasons. Safety covers are strong enough to allow a full-grown adult to not get wet or fall through. It could also be to extend the swimming season by keeping in heat.