# what is DOM When you write HTML and view it in the browser, the browser turns your HTML into something that is called the Document Object Model or the DOM. The DOM is represented in a tree that looks very much like HTML. basically dom is is tree html head have links, meta, title... body have div ,span,p tag and other nested roots The document is responsible for everything from the opening HTML tag <html>, the doctype as well, to the closing HTML tag(</html>).