What is a prototype?

A prototype is defined as an early sample or model of a product used to test a concept or process. This definition highlights the primary function of a prototype in the product development cycle, which is to serve as a tangible representation that allows designers and engineers to evaluate ideas, test functionality, and gather feedback. Prototypes can vary in fidelity, from simple sketches or mockups to more sophisticated models that closely resemble the final product.

Using prototypes effectively can identify design flaws, assess usability, and gather customer insights early in the development process. This iterative approach helps businesses refine their products before they reach production, ultimately saving time and resources by mitigating potential issues.

The other choices do not capture the essence of what a prototype is. An advertising campaign, a final product, and a marketing strategy focus on different aspects of the product lifecycle and marketing process but do not emphasize the role of a prototype in testing and development.