Why does Google report 404 errors if they aren't an issue?

Google continuously crawls the web and discovers URLs through internal links, backlinks, or its historical index. When a page is deleted, the bot still attempts to access it and logs a 404 code. Search Console displays these attempts to provide a complete view of crawl activity, not because there is a problem to fix.

The confusion arises from the term "error" in the interface. In the mind of many SEOs, an error implies a corrective action. However, the 404 does exactly what is expected of it: properly indicates that a resource no longer exists. This has been standard web behavior since time immemorial.

Can a 404 really have zero impact on ranking?

Mueller is unequivocal: 404 pages do not penalize the rest of the site. Google simply removes these URLs from its index after a few crawl attempts. The PageRank that pointed to these pages is indeed lost, but no negative signal is transmitted to the domain.

The nuance to understand is this: if hundreds of strategic pages are generating 404, the problem is not the HTTP code itself, but that you have removed important content. The SEO impact then comes from the loss of visibility on those queries, not from an algorithmic penalty linked to the 404.

When does a 404 become truly problematic?

The 404 is concerning in three specific situations. First case: active and important pages return 404 due to a technical error (bad server rule, faulty plugin, etc.). Second case: a massive internal linking points to 404s, wasting crawl budget and degrading UX.

Third case: quality backlinks lead to 404s without a 301 redirect to a relevant alternative. In this scenario, you lose link equity and traffic opportunities. In these situations, it's not the 404 that is the problem, it's the lack of management strategy.

• Natural 404s (voluntarily deleted pages, permanently out-of-stock products, obsolete content) do not require any action.
• Search Console displays 404s transparently, not to signal an urgent need for action.
• No negative impact on ranking as long as strategic pages remain accessible.
• Focus your attention on 404s that drain internal linking or valuable backlinks.
• A regular 404 audit helps detect unintentional technical errors, but don't aim for zero 404s.

Is this statement consistent with field observations?

Overall, yes. Sites that have numerous legitimate 404s do not experience observable ranking losses, as long as their active structure remains solid. Regular audits show that Google continues to crawl effectively through sites with a significant history of 404. [To check] remains the issue of crawl budget on very large sites: some empirical reports suggest that an excessive number of 404s may slow the discovery of new URLs, even if Google doesn’t officially admit it.

Where Mueller is absolutely right is regarding the unjustified panic triggered by Search Console. Clients panic upon seeing 300 404 errors when 290 are seasonal product listings that were voluntarily deleted. This statement allows for a refocusing of priorities and prevents wasting time on non-issues.

What nuances should be added to this position?

Mueller refers to expected 404s, and that is the key term. An expected 404 is a page you have voluntarily removed because it no longer had reason to exist. However, in practice, many 404s are discovered afterward without any prior planning: failed migrations, unmapped URL changes, content mistakenly deleted.

In these cases, the 404 is not an algorithmic issue, but it becomes a business problem. If a 404 page is still generating traffic via backlinks, you are losing conversions. If your internal linking points to nothing, the UX deteriorates. Google isn't penalizing you, but you are undermining yourself.

In what cases does this rule not apply?

Beware of soft 404s, pages that return a 200 or 302 code but display empty content or an error message. Google dislikes them because they pollute the index with worthless URLs. A true 404 is clean; a soft 404 is a signal of poor technical management.

Another exception: 404 errors on critical resources (CSS, JS, important images). If Googlebot cannot load a resource necessary for rendering, it impacts mobile-first indexing. Again, it’s not the 404 itself that causes the problem, but that you’re blocking the bot from accessing assets it needs to understand the page.

What practical steps should you take regarding the 404s reported in Search Console?

The first step is to sort the 404s by their origin. Search Console shows you where the crawl attempts are coming from. If Google is discovering an old URL via its historical index or an external backlink, that's normal. If your own site is generating these 404s via internal links, it's a maintenance issue that needs to be corrected.

The second reflex is to check if these pages had traffic or backlinks. Use a tool like Ahrefs or SEMrush to see if any links still point to those URLs. If they do, set up a 301 redirect to a relevant alternative page. If the page had no traffic or backlinks, leave the 404 alone.

What mistakes should be avoided when handling 404s?

A common mistake is to redirect all 404s to the homepage. This is a UX disaster and Google eventually interprets this as soft 404. If you don’t have a relevant replacement page, let the 404 do its job. A good 404 is better than a bad redirect.

Another trap is trying to achieve zero 404s in Search Console. This is impossible and counterproductive. You will waste hours on URLs that have no impact while real indexing problems linger. Focus your energy on the 404s that drain internal linking or backlinks, not on the exhaustive list.

How to effectively audit the 404s on your site?

Launch a crawl with Screaming Frog or Sitebulb to detect broken internal links. Correct these as a priority: update URLs or remove dead links. Next, export the 404s from Search Console and cross-reference them with your backlink tool to identify those still receiving link equity.

For these strategic 404s, create a decision matrix: 301 redirect to a nearby page if the content still exists in another form, 410 Gone if you want to signal a permanent removal and speed up index removal, or simple 404 if no action needs to be justified. Only address what has a measurable impact.

• Segment the 404s: those generated by your internal linking vs those discovered by Google through external sources
• Prioritize the correction of broken internal links to improve crawl and UX
• Identify the 404s that still receive quality backlinks and redirect them intelligently
• Use the 410 Gone code for permanent removal of important content, it speeds up index cleanup
• Avoid massive redirects to the homepage; prefer to leave a proper 404 if there’s no relevant alternative
• Don’t aim for zero 404s: focus on URLs that have significant business or SEO stakes