What is the purpose of using an oven gap filler and how does it help in maintaining the cleanliness and efficiency of the oven?

An oven gap filler is used to fill the space between the oven and the countertop to prevent food crumbs, spills, and debris from falling into the gap. This helps in maintaining the cleanliness of the oven by preventing build-up of dirt and grime in hard-to-reach areas. Additionally, the gap filler helps in improving the efficiency of the oven by preventing heat loss and ensuring even cooking temperatures.