Can you explain what is meant by the concept of DDD in software development?

DDD (Domain-Driven Design) is an approach to software development that focuses on a deep understanding of the subject area (domain) and building a model that reflects business logic.

Main ideas of DDD:

• Domain Model — the central element that describes entities, their behavior, and rules.
• Ubiquitous Language — a common language between developers and domain experts used in code and discussions.
• Bounded Contexts — different parts of the system may have their own models and language to avoid confusion.
• Entities and Value Objects — different types of objects with different behaviors and identities.
• Aggregates — groups of related objects considered as a single unit for changes.

DDD helps create more maintainable and understandable code closely related to business requirements.