The Complete Guide to Link Health Checking

What Is Link Health?

Link health encompasses multiple factors that determine whether a backlink is actively providing SEO value. A “healthy” link is present on the page, dofollow, on an indexed page, within relevant content, and accessible to search engine crawlers.

The Health Check Checklist

A complete link health check examines:

• Presence — The link physically exists on the page
• Status code — The linking page returns HTTP 200
• Dofollow status — No nofollow, sponsored, or ugc attributes
• Indexation — The page is in Google’s index
• Robots.txt — No directives blocking crawler access
• Meta robots — No noindex or nofollow meta tags
• JavaScript rendering — The link appears in the rendered DOM
• Canonical — The page’s canonical URL points to itself
• Content context — The surrounding content is relevant and not degraded

Manual vs Automated Checking

For small link profiles (under 50 links), manual monthly checks are feasible:

• Open each linking page in a browser
• View source to verify the link element
• Check Google’s cache for the page
• Verify dofollow status in the HTML

For larger profiles, automated checking is essential:

• Configure scheduled crawls of all monitored URLs
• Set up alerts for status changes across all health dimensions
• Generate regular reports on overall portfolio health
• Prioritize human review for flagged issues

Interpreting Results

Not every health issue requires action:

• Temporary errors — A single failed check may be a server hiccup. Confirm on the next check before acting.
• Minor content changes — Small edits to surrounding text usually do not affect link value
• Redirect chains — A single redirect is usually fine; chains of three or more may need attention

Building a Monitoring Schedule

Structure your monitoring by link value:

• High-value links (DR 50+) — Check weekly
• Standard links (DR 25-50) — Check bi-weekly
• Lower-value links (DR under 25) — Check monthly

This tiered approach ensures critical links get attention without wasting resources on less impactful ones.