Trolleys, also known as CARTS, are wheeled vehicles used to transport goods or people. They are usually pushed or pulled by a person, and can be found in many different sizes and shapes. Trolleys are commonly used in supermarkets, airports, and other public places. They are also used in industrial settings, such as warehouses and factories, to move heavy items from one place to another. Trolleys are an efficient and convenient way to transport goods and people.