Model-driven development (MDD) is a software development approach that focuses on creating and using abstract models to design and build applications. These models represent the system's structure and behavior, allowing developers to visualize and understand complex systems more easily. By using high-level models, MDD aims to improve productivity and reduce errors in the development process. In MDD, models are often transformed into executable code through automated tools, which can streamline the development workflow. This approach emphasizes the importance of UML (Unified Modeling Language) and other modeling languages, enabling teams to communicate effectively and maintain consistency throughout the project lifecycle.