The DOM (Document Object Model) is a programming interface for web documents. It represents the structure of a web page as a tree of objects, allowing scripts (like JavaScript) to interact with the content and structure of the document. In the JavaScript DOM:

1. Nodes: Each element in the HTML (such as <div>, <p>, or <h1>) is represented as a node in the DOM tree.

2. DOM Manipulation: JavaScript can be used to manipulate these nodes—adding, removing, or modifying elements on a web page.

3. Events: The DOM provides ways to handle events (like clicks or keyboard inputs), enabling interactivity on websites.