DOM is a programming interface used on documents to sort the objects in that file into a hierarchical structure known as a tree of objects. This allows coders to work with these objects dynamically by using JavaScript and other scripting languages. DOM also makes your webpage more dynamic as you can respond to user actions like clicks while also making web applications more user-friendly and efficient.
DOM only works with specific file types (HTML/XML) which is why you should always look up what DOM works with before anythig else unless you don't plan on using DOM. The same can be said for scripting languages as DOM only works with specific ones like JavaScript, VBscript, Visual Basic and Java.
DOM's implementation in browsers is a lot more diverse and less strict on what you can use when compared to what scripting languages and document types it works with. DOM works on browsers such as Google Chrome, Microsoft Edge, Firefox, Opera GX, Safari, and more including common IOS and Android browsers. This allows for more people to be able to experience and use DOM which is important to the growth of computer science and software development as a whole.
Overall, DOM is a programming interface that you should use when creating a webpage in HTML or XML, especially if you plan on using a scripting language like JavaScript. DOM works with all sorts of different browsers and scripting languages and it will allow you to create a more dynamic webpages and will overall improve both the user and developer experience.