The category of Dolly refers to a wheeled platform or cart used for moving heavy objects with ease. Dollies typically have four wheels and a flat surface to support items such as boxes, furniture, and equipment. They are commonly used in warehouses, factories, and during house moves. Dollies come in various sizes and styles to accommodate different types of loads. Some dollies have handles for pushing or pulling, while others are designed to be lifted and carried. The primary function of a dolly is to aid in transporting heavy items while reducing strain on the user.