Fill light is a type of lighting used in photography and videography to reduce shadows and balance the overall exposure of a scene. It is typically softer and less intense than the main light source, known as the key light. The purpose of fill light is to illuminate the darker areas of a subject without overpowering the key light, creating a more natural and even look. In a typical lighting setup, fill light can be achieved using various sources, such as reflectors, softboxes, or even natural light. The placement and intensity of the fill light are crucial, as they help to maintain the desired mood and depth in the image while ensuring that details are visible in shadowed areas.