A decal is a design or image printed on a special paper that can be transferred to another surface. They are often made from vinyl or paper and can be used for decoration or branding. Decals are commonly found on vehicles, windows, and walls, allowing for easy customization without permanent changes. To apply a decal, the design is typically cut out and then adhered to a clean surface using an adhesive backing. Once in place, the backing is removed, leaving the design intact. Decals can be used for various purposes, including advertising, art, and personal expression.