Event handling is a programming concept that allows software to respond to specific actions or occurrences, known as events. These events can include user interactions like clicks, key presses, or mouse movements, as well as system-generated events such as timers or network responses. When an event occurs, the program triggers a predefined function, often called an event handler, to execute a specific task or set of tasks. In many programming environments, such as JavaScript or Java, event handling is essential for creating interactive applications. Developers can define how their applications should react to different events, enhancing user experience and functionality. By managing events effectively, programmers can build responsive and dynamic interfaces that engage users.