MVC (Model-View-Controller) is a software design pattern for implementing user interfaces, dividing an application into three interconnected components. The Model represents the application's data and business logic, the View displays the data (user interface), and the Controller handles user input and updates the Model and View accordingly. This separation of concerns facilitates modularity, maintainability, and testability of the application. MVC is widely used in web development frameworks such as Ruby on Rails, ASP.NET MVC, and Laravel, enabling developers to build scalable and organized applications with clear separation between data, presentation, and user interaction.