What is DOM (Document Object Model)? 

Document Object Model (DOM) is a fundamental concept in web development that represents the structure of an HTML or XML document as a hierarchical tree of objects. Each element in a webpage—such as headings, paragraphs, links, and images—is treated as a node within this tree. By providing a structured way to access and manipulate these elements, the DOM allows developers to dynamically update web content, modify styles, and respond to user interactions without requiring a full page reload.

One of the key strengths of the DOM is its ability to interact with JavaScript, enabling real-time updates and interactive experiences. Through built-in methods like getElementById(), querySelector(), and addEventListener(), developers can select elements, change their content, and attach event listeners to capture user actions.