Layered architecture is a design pattern commonly used in software development to organize code and functionality into distinct layers or tiers.

Each layer in a layered architecture is responsible for a specific aspect of the application, allowing for greater modularity, scalability, and maintainability. At its core, layered architecture separates the concerns of an application into different layers, with each layer having a specific role and responsibility.

This separation of concerns helps to improve the overall structure of the application, making it easier to understand, modify, and extend. Typically, a layered architecture consists of three main layers: the presentation layer, the business logic layer, and the data access layer.

The presentation layer is responsible for handling user interface interactions, such as displaying data to the user and capturing user input.

The business logic layer contains the core logic of the application, including processing data and implementing business rules.

The data access layer is responsible for interacting with the database or other data sources, handling data retrieval and storage operations. By separating these concerns into different layers, developers can focus on specific areas of the application without having to worry about the intricacies of other layers.

This separation also allows for easier testing and debugging, as each layer can be tested independently of the others. Overall, layered architecture provides a structured approach to software development, promoting code reusability, maintainability, and scalability.

It is a widely used design pattern in the industry, favored for its ability to streamline development workflows and improve the overall quality of software applications.