404 Error

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Filed underSEO

In brief · quick answer

A 404 error is an HTTP status code indicating that a requested page does not exist on the server, typically due to a broken link, deleted page, or mistyped URL.

§ 1 Definition

404 errors are the web's 'dead ends.' They happen when a user or bot requests a URL that no longer exists or never existed. From an SEO perspective, the damage depends on context. A few 404s on a large site are normal and harmless. Thousands of 404s on a small site signal poor maintenance. 404 errors on pages that once had backlinks waste those links.

§ 2 Soft 404s: The Hidden Problem

A soft 404 is worse than a real 404. It occurs when a page returns a 200 (success) status code but displays a 'Page Not Found' message or blank content. Google interprets this as a thin content page and may associate the 200 status with poor quality across the site. Always return a proper 404 or 410 status for deleted content.

§ 3 Managing 404s

Use 301 redirects to send deleted pages to relevant replacements. Create custom 404 pages with navigation to help users. Monitor 404s in Google Search Console and fix the highest-value ones. Use 410 (Gone) instead of 404 if the page was intentionally and permanently removed.

§ 4 Note

Not all 404s need fixing. A 404 from a mistyped URL that no one links to is irrelevant. A 404 from a page that had backlinks or high traffic requires action. Prioritize based on value at risk.

Key takeaways

404s are expected in moderation but a problem at scale
Soft 404s (200 status with no content) are worse than real 404s
Redirect high-value 404s to relevant replacements

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# 404 Error

A 404 error is an HTTP status code indicating that a requested page does not exist on the server, typically due to a broken link, deleted page, or mistyped URL.

Category: SEO

Author: Atomic Glue SEO & GEO Team

## Definition

## Soft 404s: The Hidden Problem

## Managing 404s

Use [301 redirects](/glossary/301-redirect) to send deleted pages to relevant replacements. Create custom 404 pages with navigation to help users. Monitor 404s in [Google Search Console](/glossary/google-search-console) and fix the highest-value ones. Use 410 (Gone) instead of 404 if the page was intentionally and permanently removed.

## Note

Not all 404s need fixing. A 404 from a mistyped URL that no one links to is irrelevant. A 404 from a page that had backlinks or high traffic requires action. Prioritize based on value at risk.

## Key takeaways

404s are expected in moderation but a problem at scale
Soft 404s (200 status with no content) are worse than real 404s
Redirect high-value 404s to relevant replacements

## Related entries

Last updated June 2026. Permalink: atomicglue.co/glossary/404-error