Domain-Driven Design, or DDD for short, isn't about code at first. It's about understanding the main business inside out, and then designing software that speaks the business's language. Think about a hospital system. Before we write code, we would talk about patients, doctors, treatments, and appointments. By diving deep into the "domain" or the core of the business, we create software that feels like it was tailor-made for it. DDD is super useful for businesses with unique rules and ways of doing things. Let's take insurance as an example. They've got tons of rules on who gets covered, how much…