Why should one add ID to their HTML tags?

Question

A simple question: why should we add the id into our HTML tags if they work perfectly well without them? I know that one of their uses is being able to navigate

Answer 1

The main reason I use ids for my HTML elements is the fact that their selection is faster, in Javascript with getElementById and in CSS as well, using the #id class.

Of course, I'm not saying this is always a good idea, especially in CSS, where having classes based on ids can cause a lot of redundancy, it's just one of the reasons