Should you really be worried about 404 errors reported in Search Console?

What does Mueller really mean by this statement?

John Mueller is countering a common belief among SEOs: the idea that any 404 error would penalize the site in rankings. His position is clear: a 404 is a normal HTTP response that simply indicates a resource no longer exists.

In most cases, these errors come from previously indexed pages that have been legitimately removed. A site that evolves naturally generates 404s, and Google is fully aware of this. The search engine does not see it as a negative signal in itself.

Why does Google emphasize this point so much?

Search Console often reports hundreds or even thousands of 404s, causing unnecessary anxiety among website owners. Google likely receives a huge number of support tickets on this issue, hence this recurring communication.

Mueller explicitly mentions improvement technologies such as redirects and sitemap cleaning. He does not say that 404s are ideal, but that they do not pose a danger if you manage your architecture correctly. The nuance is important.

In what contexts does this rule truly apply?

Mueller's statement mainly covers organic 404s resulting from a site's natural evolution. Removing out-of-stock products in e-commerce, archiving old blog posts, restructuring navigation: these are all legitimate situations.

On the other hand, if your site is generating massive 404s due to broken internal links, technical issues or poorly managed migration, the problem changes. These errors degrade the user experience and waste crawl budget on dead ends.

• 404s are not a penalty factor according to Google, but they can reveal structural issues
• A legitimately deleted page should return a 404, not a soft 404 or a generic redirect to the homepage
• The volume of 404 errors in Search Console is not a quality KPI in itself
• Sitemaps must remain clean: never include URLs returning 404
• 301 redirects should only be used when a relevant alternative exists

Is this position consistent with real-world observations?

Yes, in the majority of cases. Sites with thousands of historical 404s typically suffer no loss of organic traffic if these errors are related to legitimately disappeared pages. I have audited e-commerce sites with over 10,000 404 errors reported in Search Console without visible impacts on their performance.

The issue arises when 404s are symptomatic of an unresolved technical problem. A site generating hundreds of new 404 errors daily due to poorly configured dynamic facets or broken internal links truly has an issue, even if Google does not penalize it directly for the 404s themselves.

What nuances should be added to this statement?

Mueller remains deliberately vague about the concept of crawl budget. If Googlebot spends a significant part of its time crawling URLs that consistently return 404, that is time not spent on your strategic pages. [To verify] on medium-sized sites, but critical on high-volume ones.

Another point: 404s from external backlinks deserve specific treatment. If a page that received quality links now returns a 404, you are losing that authority. In this specific case, a 301 redirect to the closest content is recommended, contrary to the minimalist approach suggested by Mueller.

In which cases does this rule not apply?

Mueller's statement does not apply well to high turnover content sites such as classified ads platforms or event sites. These sites can generate massive volumes of 404s very quickly, creating abnormal crawling patterns even if each 404 taken in isolation is legitimate.

Similarly, during a site migration, the logic completely reverses. A migration that generates thousands of 404s on previously strategic URLs is a failure, regardless of what Mueller says. In this context, each 404 should be audited and treated individually with relevant 301 redirects.

What should you concretely do with the 404s reported in Search Console?

The first step: sort 404 errors by volume and origin. Search Console will show you the source URLs pointing to the 404s. If they are internal links, correct them immediately. If they are URLs discovered by Google via your sitemap, remove them from the XML file.

For 404s from external backlinks, analyze the authority of the referring domains. A link from a high DR site pointing to a 404 justifies a 301 redirect to the most relevant page. A 404 discovered through random crawling without a backlink can remain as is.

What mistakes should you absolutely avoid?

Never mass redirect all your 404s to the homepage. Google detects these generic redirects and may ignore them, turning your 301s into soft 404s. Worse, you degrade the user experience by sending visitors to a page unrelated to their search.

Another common trap: leaving URLs in 404 in your XML sitemap. This is a contradictory signal sent to Google that indicates you have poor control over your architecture. Implement an automated process to ensure that each URL in the sitemap returns a 200 status code.

How can you check if your management of 404s is optimal?

Use a crawler like Screaming Frog or Oncrawl to identify all broken internal links. The goal: zero internal links pointing to a 404. This is the minimum requirement for clean architecture.

Analyze your server logs to identify the most frequently crawled 404 URLs by Googlebot. If certain ones keep showing up, they are likely receiving backlinks or internal links you haven’t detected. Address those as a priority.

• Audit your internal links: none should point to a 404
• Clean up your XML sitemap: remove any URL that does not return a 200 status code
• Identify 404s receiving quality backlinks and redirect them to relevant content
• Set up a custom 404 page with navigation and content suggestions
• Monitor new 404 errors in Search Console weekly to catch emerging issues
• Document your decisions: why this 404 is left as is, why that one is redirected