Event-driven programming is a programming paradigm where the flow of the program is determined by events, such as user actions (like clicks or key presses), sensor outputs, or messages from other programs. In this model, the program waits for events to occur and then responds to them, allowing for more interactive and responsive applications. In event-driven systems, components called event handlers are triggered when specific events happen. This approach is commonly used in graphical user interfaces (GUIs) and web applications, making it easier to manage complex interactions and improve user experience by reacting dynamically to user input and other events.