Enhanced Flavor and Cooking Performance
In addition to cooling, a rack can also ensure that baked items don't overlap or become misshapen while cooling. For example, if you're baking multiple trays of cookies, having them spaced out on individual racks will prevent them from sticking together, allowing each cookie to maintain its perfect round shape. This aspect is especially important for cakes and pastries, where presentation plays a significant role in the enjoyment of the dish.
oven cooling rack

You can control the temperature on a gas grill and keep the temperature lower, so you can more easily prevent the meat from charring and creating carcinogens like HCAs. Plus, with lower heat, you can greatly reduce smoking, so there will be fewer dangerous PAHs, the Lakatos twins say.