Why it matters
Broken links waste crawl budget and dead-end users; ChatGPT and Claude crawlers spend about 34% of fetches on 404s. Broken nav/footer links repeat on every page (error).
How to fix it
Fix or remove the links, and link straight to final URLs instead of redirecting ones.
References
More seo rules
void seo reports 60 rules in this category. What search engines need from the raw response: status codes, titles and descriptions in <head>, self-referencing canonicals, one h1, crawlable links, Open Graph, icons, robots.txt and a sitemap with real dates.
img-alt-missing<img> without an alt attributeimg-alt-qualityAlt text is a filename, a generic word, or overly longlinks-not-crawlableNavigation uses elements crawlers can't followlink-textLinks with generic or empty texttrailing-slashBoth trailing-slash and non-slash URLs serve 200hreflang-invalidhreflang uses invalid codes or relative URLshreflang-not-reciprocalhreflang set isn't self-referencing and reciprocalog-missingRequired Open Graph tags missing (og:title, og:type, og:image, og:url)