A prototype is an early model, sample, or initial version of a product created to test and evaluate its design, functionality, or concept before full-scale production. It allows designers and engineers to identify issues, refine features, and gather feedback to improve the final product. In the context of Shenzhen Alu Rapid Prototype Precision Co., Ltd., prototyping refers to their services in creating these preliminary models using techniques like CNC machining, 3D printing, or die casting for industries such as aerospace or automotive.