In photography, a reflector is a device used to manipulate light. It is typically a flat, reflective surface that bounces light onto the subject. Reflectors are commonly used in product photography to fill in shadows and create a more balanced, even lighting on the subject. They are available in various colors like white, silver, gold, and black, each serving different purposes in modifying the light's quality and color temperature. Reflectors are portable and versatile tools that can make a significant difference in the outcome of a photo shoot by enhancing the overall lighting conditions.