Model-View-Controller (MVC) is an architectural design pattern used to structure software applications. It is a way of dividing an application into three distinct parts: a model, view, and controller. The model handles the data, the view displays the data, and the controller manages the interactions between the two.

The model is the layer of the application responsible for managing the data. This includes retrieving, storing, and manipulating the data. It is typically made up of classes and objects that represent the data in the application. For example, if you were building an application to manage a customer database, the model would contain classes such as Customer and Address.

The view is the layer of the application responsible for displaying the data. This could be in the form of a web page, a mobile app, or a desktop application. The view is usually made up of HTML, CSS, and JavaScript. It is responsible for taking the data from the model and presenting it in a way that is easy for the user to understand.

The controller is the layer of the application responsible for controlling the interactions between the model and the view. It is the layer that handles the business logic of the application. For example, the controller could be responsible for validating user input, or for executing a search query against the model.

MVC is an effective way of organizing an application. It allows developers to separate the different aspects of the application so that changes to one part of the application don’t affect the other parts. This makes it easier to maintain and extend the application. It also makes it easier for multiple developers to work on the same application without stepping on each other’s toes.

MVC is a widely used pattern in many modern applications, such as web applications, mobile applications, and desktop applications. It is a powerful and flexible way of structuring an application, and is well worth learning if you are a software developer.