Software is not just about code. If you think about it, code is rarely the end goal of our profession. Code is just the medium to solve business problems. So why does it have to talk a different language? Domain-Driven Design emphasizes making sure businesses and software speak the same language. Once broken the barrier, there is no need for translations or tedious syncing, information doesn't get lost. Everyone contributes to discovering the Business Domain, not just coders. The resulting software is the only truth for the common language.

Domain-Driven Design it also provides a framework for strategic and tactical design — strategic to pinpoint the most important areas to develop based on business value, and tactical to build a working Domain Model of battle-tested building blocks and patterns.