John Mueller paraphrased:
“In short, should I add stopper words to words that are taken from page titles in the URL?
For example, should I call a page why-is-the-sky-blue.html or why-sky-blue.html?”
Mueller answered:
Google Search only uses URLs for keywords.
It is important not to overthink it.
It would help if you use durable URLs, don’t change them often, and make them helpful to users.
It doesn’t matter if you add stop words to them or decide to use numeric IDs. That’s up to you.