SysML, or Systems Modeling Language, is a general-purpose modeling language used to specify, analyze, design, and verify complex systems. It extends UML (Unified Modeling Language) to support systems engineering, enabling professionals to model hardware, software, data, processes, and personnel within a unified framework. SysML is widely used in industries such as aerospace, automotive, and defense to facilitate clear communication and collaboration among multidisciplinary teams. Its diagrams help represent system requirements, structure, behavior, and parametrics, making it easier to manage complexity and ensure system integrity throughout the lifecycle.