System Specification is a detailed description of a system's requirements and functionalities. It outlines what the system should do, including its features, performance criteria, and constraints. This document serves as a guide for developers and stakeholders, ensuring everyone has a clear understanding of the system's objectives. The specification typically includes various components such as functional requirements, non-functional requirements, and user interfaces. It helps in managing expectations and provides a basis for testing and validation. By clearly defining the system's scope, it aids in the successful development and implementation of the project.