Aside from helping aid the flow of website traffic, what is the best explanation for the purpose of internal links in SEO?

Internal links tell Google how credible you are based on the websites you decide to link to from your own pages.

Internal links don't matter for SEO.

Internal links are more like on$-$page SEO factors in signaling to search engines the relevant topics of your pages.

Internal links are like votes from other websites that boost your overall website popularity.