Domain-Driven Design (DDD) is an approach to software development that focuses on creating high-quality, flexible, and maintainable software by deeply understanding and modeling the problem domain. DDD emphasizes collaborative and iterative exploration of the problem space together with domain experts, enabling the creation of software systems that closely reflect real-world domains. 

By aligning software design with the underlying business requirements, DDD helps in building robust, scalable, and adaptable solutions that can evolve over time. It encourages the use of well-defined domain models, common language, and strategic patterns to capture the essence of complex domains, resulting in software that is more intuitive, understandable, and aligned with the needs of the users. DDD is not a technology or methodology, but a mindset that fosters collaboration, domain expertise, and continuous learning. It is an approach for developing high-quality software systems.