A Specification Language is a formal language used to describe the properties and behaviors of a system or software. It allows developers and engineers to specify what a system should do without detailing how it will be implemented. This helps in creating clear and unambiguous requirements, which can be understood by both technical and non-technical stakeholders. These languages often include mathematical notations and logical expressions, making them suitable for rigorous analysis. Examples of specification languages include Z, VDM, and Alloy. By using these languages, teams can ensure that their designs meet the necessary criteria before moving on to development.