Clean Architecture is a software design philosophy aimed at organizing code for maintainability, testability, and flexibility. It separates an application into distinct layers with specific responsibilities, reducing dependencies between them. The architecture is structured in concentric circles, where the inner circles contain the most critical and stable parts of the system, like business rules, while the outer circles handle more specific details, like databases or UI frameworks. Here's a breakdown of the layers: Entities - These are the core business objects or models of the application. They contain enterprise-wide rules that are independent of other layers. Use Cases - This layer holds application-specific business rules and coordinates the flow of data between entities and external systems. It focuses on application logic rather than UI or infrastructure details. Interface Adapters - This layer adapts the core application logic for external interfaces. For instance, it can contain presenters or controllers in a web application that adapts data for the view. Frameworks and Drivers - This is the outer layer, containing things like databases, UI frameworks, and other external systems. These components interact with the core business logic but are kept separate to minimize dependencies. The Dependency Rule—One key principle of Clean Architecture is that all dependencies must point inwards, towards the core layers. This isolates the business logic and allows the outer layers to be replaced or changed with minimal impact. Following Clean Architecture makes the codebase easier to maintain, test, and scale, as each layer can be developed and modified independently.