The internal link is an item that allows you to check the back link on the site.
It is said that it is very effective to link not only external pages but internal pages with each other when there are important pages in the site. In an ideal site structure, internal links are more important for important pages. It is said that many people are gathering.
The number of internal links to a page is a measure that tells Google about the relative importance of the page. If your important pages aren’t listed in this section, or if you have a lot of internal links on pages that aren’t that important, you’ll need to review the internal link structure.