Why it matters
Anchor text is a relevance signal for the target page and the only context screen-reader and agent users get; "click here" and icon-only links carry none.
How to fix it
Use descriptive anchor text ("Read the pricing FAQ"). Give icon-only links an aria-label.
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.
heading-skipHeading levels skip (h2 → h4) or headings are emptyimg-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 followbroken-linksInternal links return 4xx/5xx (or go through redirects)trailing-slashBoth trailing-slash and non-slash URLs serve 200hreflang-invalidhreflang uses invalid codes or relative URLshreflang-not-reciprocalhreflang set isn't self-referencing and reciprocal