JavaScript Events are actions or occurrences that happen in the browser, which can be detected and responded to by the code. Examples include user interactions like clicking a button, moving the mouse, or pressing a key. These events allow developers to create dynamic and interactive web applications by executing specific functions when an event occurs. When an event is triggered, it can be handled using event listeners, which are functions that wait for a specific event to happen. Developers can attach these listeners to HTML elements, enabling them to respond appropriately, such as displaying a message or changing the content on the page.