A prefabricated multi-storey building is a multi-level structure where most components are manufactured off-site in a factory before being transported and assembled at the construction site. This method significantly reduces on-site construction time and costs, improves quality control due to factory-controlled conditions, and can be more sustainable and energy-efficient. The buildings are versatile, used for residential, commercial, or office spaces, and can be designed with components like steel frames, composite slabs, and insulated panels.