Components and Actions are fundamental concepts in software development. Components are modular building blocks that encapsulate a part of the user interface and its behavior. They promote reusability and maintainability by breaking down the UI into independent and reusable elements. On the other hand, Actions represent the behavior or functionalities that can be performed within a software application. They are triggered by user interactions or system events and are responsible for updating the application state or invoking specific operations. Understanding how components and actions work together is crucial in creating robust and interactive software systems.