A prototype is a preliminary model of a product that helps designers and engineers test their ideas before final production. For example, when creating a new smartphone, a company might build a prototype to evaluate its size, shape, and features. This allows them to identify any issues and make improvements based on user feedback. Prototypes can vary in complexity, from simple sketches to fully functional models. In the case of a car prototype, engineers might create a physical version to test its performance on the road. This process is crucial for ensuring that the final product meets the needs and expectations of consumers.