What Is a Broken Link?
A broken link is a hyperlink that points to a URL that no longer returns a valid webpage — typically returning a 404 (Not Found) error. Broken links can occur on your own site (internal broken links) or can be links from external sites that once pointed to a page on your domain that has since been deleted, moved, or restructured without a redirect in place.
Broken links arise from common site management activities: deleting old pages without implementing 301 redirects, restructuring site architecture and changing URL patterns, migrating to a new domain or CMS, and external sites linking to content that has since been removed. They also occur naturally over time as external pages link to specific deep pages on your site that have since changed.
The HTTP 404 response code is the clearest indicator — it signals to both users and crawlers that the requested resource does not exist at the specified URL. Other related status codes that indicate link problems include 410 (Gone, indicating the resource has been permanently removed), 503 (Service Unavailable), and redirect chains that end in errors.
Why Broken Links Matter for Marketers
Broken links create friction at a point of high intent. A user who clicks a link — whether from search results, from another page on your site, or from an external reference — is expressing active interest. Landing on a 404 page converts that interest into frustration and often leads to abandonment. For broken internal links, this means losing readers mid-journey on your own site; for broken inbound links from external sites, it means losing referral traffic you've already earned.
The SEO consequences compound this user experience problem. Link equity — the authority signals that pass through hyperlinks from one page to another — is a critical ranking input. When an external site links to a page on your domain that no longer exists, that link equity is wasted rather than flowing to a live, rankable page. At scale, a high volume of inbound links hitting 404 pages represents a significant loss of accumulated authority.
Crawl budget is also at stake. Search engines allocate a finite budget to crawling each site. When crawlers repeatedly encounter 404 errors while following internal links, they waste crawl budget on dead ends rather than discovering and indexing new content. For large sites with limited crawl budgets, systematic broken link cleanup can meaningfully improve indexing frequency and coverage.
How to Implement Broken Link Repair
Conduct a full site crawl using a tool like Screaming Frog, Ahrefs, or Google Search Console to identify all internal and external broken links. Google Search Console's "Coverage" report surfaces 404 errors that Googlebot has encountered on your domain.
For internal broken links: implement 301 redirects from the broken URL to the most relevant live page. If the content has been replaced by an updated version, redirect to the replacement. If no direct equivalent exists, redirect to the most topically relevant parent page.
For broken inbound links from external sites: contact the linking site and request a link update — particularly for high-value domains where the relationship and domain authority justify the outreach effort. For high-traffic inbound links hitting 404 pages, implement a 301 redirect even without contacting the linking site, so the referral traffic and link equity are recovered.
Integrate broken link monitoring into your ongoing technical SEO workflow. New broken links are introduced continuously as sites evolve. Monthly crawls and Search Console monitoring ensure they are caught and resolved quickly rather than accumulating.
How to Measure Broken Link Impact
Track: total number of broken internal links (target: zero), number of inbound links pointing to 404 pages (track in Ahrefs or Majestic), and Search Console 404 impressions from organic search. After a redirect implementation campaign, monitor the recovery of organic impressions for pages that were previously 404ing.
Measure crawl efficiency before and after broken link cleanup: are crawl budget reports showing fewer 404 errors and more successful page crawls? This confirms that cleanup is improving indexing efficiency.
Broken Links and AI Search
AI systems that crawl and index web content to populate their knowledge bases encounter the same broken link problem as traditional search crawlers. A broken link in an article that AI systems reference reduces the richness of what those systems can access and cite. More directly, broken links in your own site architecture undermine the overall technical health signals that AI engines use to assess domain reliability. Maintaining a clean, well-linked site architecture — where every link resolves correctly — is a prerequisite for both traditional SEO and AI search indexing quality.