Event delegation is a powerful technique in JavaScript that lets you manage events for multiple child elements using a single event listener on a common parent. Instead of attaching individual event listeners to each element, you place one listener on a parent element, such as a ul for a list or a table for a group of rows. This approach is especially beneficial when dealing with dynamic content, where elements may be added or removed after the page loads.

The main benefits of event delegation are:

• Improved performance: you use fewer event listeners, which reduces memory usage and overhead;
• Easier management: you do not need to add or remove listeners as elements change;
• Dynamic compatibility: it works seamlessly with elements added to the DOM at any time.

You should use event delegation whenever you have a large number of similar elements (like list items, table rows, or buttons in a container) or when elements are created or removed dynamically. By relying on event bubbling, the parent element can detect events that originate from its children and respond accordingly.