This document provides an overview of domain-driven design (DDD). It discusses that organizations operate in complex, uncertain environments and DDD is an approach to align an organization's strategic goals with software design and implementation. Key aspects of DDD include splitting domains into bounded contexts to reduce complexity, defining an ubiquitous language to improve communication, and using event storming to explore the domain. The document recommends starting with DDD by running an event storming workshop to better understand the domain and break monolithic systems into business-focused microservices.