Product specification is a detailed description of a product's features, functions, and requirements. It outlines what the product is, how it works, and the standards it must meet. This document serves as a guide for designers, engineers, and manufacturers to ensure that the final product aligns with the intended design and user needs. A well-defined product specification includes information such as dimensions, materials, performance criteria, and safety standards. It helps in maintaining quality control and facilitates communication among stakeholders, including project managers, developers, and customers, ensuring everyone has a clear understanding of the product's expectations.