That's one of artistic liberties the writer is free to take. If you write a scientific paper, you name your chapters, sections, subsections 1, 1.1, 1.1.1 but other than that, you're completely free to choose. Choose whatever you see fit, whatever you feel like it fits your book.
* * *
is usually reserved for sections/scenes, a subdivision within a chapter. But then, your book may have no chapters at all, just scenes.
Chapters with meaningful names come at risk of spoilers. Readers often peek into the table of contents (even if to find the chapter where they finished if they don't have a bookmark!) and a too revealing chapter name may be a spoiler, so some authors choose more generic names - or ones more obscure.
OTOH, sometimes the author has a difficult time thinking up titles at all, so they skip the whole bother of naming chapters.
But overall, it's artistic freedom and choosing what you feel matches best. Of course roman numerals have a certain weight and elegance to them, fitting a mystery or gothic horror. A fun book for kids may have elaborate names like Chapter 16 or how Agnes learned that broccoli is not the worst of world's evils. A topical non-fiction will have descriptive titles, Chapter 5: Fluid mechanics. But in the end, it's author's hunch and personal preference.