Internal Link Checker
Counts internal vs external links on the page and their follow/nofollow mix.
What this tool checks
Page links to other internal pages
Checks the page contains at least one link to another page on the same site.
Why it matters: Internal links help search engines discover pages and pass relevance between them; an orphan-like page with no internal links is a missed opportunity.
If it fails: Add contextual links from this page to related content on your site.
Source: developers.google.com/search/docs/crawling-indexing/links-crawlable
Reasonable number of on-page links
Counts the total crawlable links on the page. Flags pages with an unusually high count (>300).
Why it matters: A very large number of links dilutes the importance passed to each and can make a page feel like a link farm. Google dropped its old "100 links" guideline but excessive linking is still a smell.
If it fails: Keep on-page links focused on what is genuinely useful to the visitor.
Source: developers.google.com/search/docs/crawling-indexing/links-crawlable