Internal style sheets are best for styles that will only apply to one page. For example, if you want to use this style of block in multiple Web pages, then you would have to copy the same Internal Style Sheet into all those pages. That creates redundancy which makes it harder to maintain uniformity among pages.

In Computer Science, any time redundancy occurs in the code, there is usually a better way to do it. If this style block was needed in multiple pages, it would be better to put the styles into an external style sheet that all those pages import. That way, a single CSS selector would control all the blocks across multiple pages.