Response Codes External Client Error (4xx)

What This Means

An outbound link on this page points to an external URL that returns an HTTP 4xx error — most commonly 404 Not Found. The external resource the page linked to has been removed or moved without a redirect.

Why It Matters for SEO

Users clicking a 4xx external link arrive at an error page instead of the intended content. This is a poor user experience and signals that the page's content has not been maintained. While broken external links do not directly harm your own rankings, they reduce the page's usefulness and trustworthiness. Google's quality evaluators consider the quality and reliability of a page's outbound links as part of overall content quality.

What the Platform Checks

The platform makes HTTP requests to each external URL discovered during the crawl and records the response code. Fires for each external link that returns a 4xx response.

How to Fix It

• Find a replacement resource that covers the same topic and update the link.
• If the content moved on the external site: search for the new URL and update the link.
• If no replacement exists: remove the link and update the surrounding text to not reference the now-unavailable resource.
• Use the Wayback Machine (web.archive.org) to find archived content if needed for replacement reference.