Outdoor grill doors are important accessories or components of a grill island, because they are related to the compartments below the actual grill that can contain different things (like utensils and tools) that are required during a barbecue. Generally speaking, outdoor grill doors are doors that can be locked, closed, and can cover a compartment of a grill island that holds grilling utensils that you never take in your house or garage with you, but rather you prefer keeping them outside close to the grill island.