Official statement
Other statements from this video 50 ▾
- 0:33 Does Google really see the HTML you think is optimized?
- 0:33 Does the rendered HTML in Search Console really reflect what Googlebot indexes?
- 1:47 Does late JavaScript really hurt your Google indexing?
- 1:47 What are the chances that Googlebot is missing your critical JavaScript changes?
- 2:23 Does Google really rewrite your title tags and meta descriptions: should you still optimize them?
- 3:03 Is it true that Google rewrites your title tags and meta descriptions at will?
- 3:45 What’s the key difference between DOMContentLoaded and the load event that could reshape Google’s rendering approach?
- 3:45 What event does Googlebot really wait for to index your content: DOMContentLoaded or Load?
- 6:23 How can you prioritize hybrid server/client rendering without harming your SEO?
- 6:23 Should you really prioritize critical content server-side before metadata in SSR?
- 7:27 Should you avoid using the canonical tag on the server side if it’s incorrect at the first render?
- 8:00 Should you remove the canonical tag instead of correcting an incorrect one using JavaScript?
- 9:06 How can you find out which canonical Google has actually retained for your pages?
- 9:38 Does URL Inspection really uncover canonical conflicts?
- 10:08 Should you really ignore noindex settings for your JS and CSS files?
- 10:08 Should you add a noindex to JavaScript and CSS files?
- 10:39 Can you really rely on Google's cache: to diagnose an SEO issue?
- 10:39 Is it true that Google's cache is a trap for testing your page's rendering?
- 11:10 Should you really worry about the screenshot in Search Console?
- 11:10 Do failed screenshots in Google Search Console really block indexing?
- 12:14 Is it true that native lazy loading is crawled by Googlebot?
- 12:14 Should you still be concerned about native lazy loading for SEO?
- 12:26 Is it really essential to split your JavaScript by page to optimize crawling?
- 12:26 Can JavaScript code splitting really enhance your crawl budget and improve your Core Web Vitals?
- 12:46 Why are your mobile Lighthouse scores consistently lower than on desktop?
- 12:46 Why are your Lighthouse mobile scores consistently lower than desktop?
- 13:50 Is your lazy loading preventing Google from detecting your images?
- 13:50 Can poorly implemented lazy loading really make your images invisible to Google?
- 16:36 Does client-side rendering really work with Googlebot?
- 16:58 Is it true that client-side JavaScript rendering really harms Google indexing?
- 17:23 Where can you find Google's official JavaScript SEO documentation?
- 18:37 Should you really align desktop, mobile, and AMP behaviors to avoid SEO pitfalls?
- 19:17 Should you really unify the mobile, desktop, and AMP experience to avoid penalties?
- 19:48 Should you really fix a JavaScript-heavy WordPress theme if Google indexes it correctly?
- 19:48 Should you really avoid JavaScript for SEO, or is it just a persistent myth?
- 21:22 Is it possible to have great Core Web Vitals while running a technically flawed site?
- 21:22 Can you really have a good FID while suffering from catastrophic TTI?
- 23:23 Does FOUC really ruin your Core Web Vitals performance?
- 23:23 Does FOUC really harm your organic SEO?
- 25:01 Does JavaScript really drain your crawl budget?
- 25:01 Does JavaScript really consume more crawl budget than classic HTML?
- 28:43 Should you restrict access for users without JavaScript to protect your SEO?
- 28:43 Is it true that blocking a site without JavaScript risks an SEO penalty?
- 30:10 Why do your Lighthouse scores never truly reflect your users' real experience?
- 30:16 Why don't your Lighthouse scores truly reflect your site's real performance?
- 34:02 Does Google's render tree make your SEO testing tools obsolete?
- 34:34 Does Google’s render tree really matter for your SEO strategy?
- 36:08 Should you really worry about loading errors in Search Console?
- 37:23 Why doesn’t Google need to download your images to index them?
- 38:14 Does Googlebot really download images during the main crawl?
The message 'X resources out of Y could not be loaded' displayed in Search Console is not necessarily a red flag. Google intentionally ignores certain resources that are unnecessary for rendering, such as analytics trackers, and the 'other error' messages often stem from an internal timeout of the tool, not an actual block by Googlebot. Focus only on critical blocked resources; the rest is just noise.
What you need to understand
Why does Google show unloaded resources?
The URL Inspection tool in Search Console tests the rendering of a page by simulating Googlebot's behavior. During this process, it attempts to load all referenced resources: CSS, JavaScript, images, fonts, third-party scripts. Inevitably, some fail or are intentionally ignored.
What Martin Splitt emphasizes here is that the count display does not have binary meaning. A page may show '15 resources out of 87 could not be loaded' without affecting its indexing or ranking. Google performs intelligent filtering: it ignores non-essential resources, particularly analytics trackers like Google Analytics, Tag Manager, Facebook pixels, and programmatic advertising scripts.
What does the 'other error' message actually mean?
This category of error is a catch-all. In most cases, it indicates a timeout of the rendering engine used by the inspection tool — not a server-side issue or a true block by Googlebot in production.
The inspection tool operates under stricter time constraints than actual crawling. If a resource takes too long to respond, it is marked as an error, whereas Googlebot in real conditions might have eventually loaded it. This discrepancy creates diagnostic noise: you see a red alert, but the bot encountered no issues.
When should you really be concerned?
Not all resource errors are equal. What matters is the impact on the final rendering. If Google cannot load your main CSS or the JavaScript file that generates all the textual content on the page, you have a real problem. If it's a third-party chat widget or a heatmap script, it's negligible.
The real question to ask is whether the rendering screenshot in Search Console looks like what a user sees? If so, resource errors are secondary. If the page appears broken or empty, then it's time to investigate — but it will be visually obvious.
- Prioritize critical resources: inline CSS/JS or at the start of
<head>, files that inject textual content. - Ignore non-essential third-party scripts: analytics, advertising, social widgets — Google actively filters them.
- Check the screenshot rather than the count: it's the final arbiter of rendering success.
- Recurring 'other error' messages on critical resources warrant analysis of server response times.
- An internal timeout of the tool never leads to deindexation — validate with a URL inspection test over several days.
SEO Expert opinion
Is this statement consistent with field observations?
Yes, absolutely. We have observed for years that sites showing 50+ blocked resources in Search Console continue to rank normally and have their content indexed without issues. The confusion arises because the GSC interface does not contextualize the error: it displays an alarming count without indicating that 80% of the affected resources are trackers or decorative assets.
From practical experience, the real indexing problems related to resources are systematically correlated with broken rendering. If the screenshot shows a blank page or one without textual content, you have an issue — but again, it’s not the count that alerts you; it’s the visual inspection. Martin Splitt's message confirms what practitioners already know: stop panicking over every red point.
What nuances should be added?
The first point: saying that Google "does not load certain unnecessary resources" is an oversimplification. In reality, Google attempts to load them, fails or times out, and then continues rendering without them. This isn't a decision based on a whitelist; it's a logic of resilience to failure. A critical nuance to understand why some errors appear intermittently.
The second point: the term "unnecessary" is subjective. Google Analytics is unnecessary for content rendering, but not for analyzing your traffic. But from Googlebot's perspective, any script that does not inject indexable content or modify relevant DOM structure is indeed ignorable. [To be verified]: Google has never published an exhaustive list of domains or patterns of actively filtered resources — this behavior is inferred through observation.
When does this rule not apply?
If your site relies on a modern JavaScript framework (React, Vue, Angular) with client-side rendering, every JS file becomes critical. A loading error on a code-splitted chunk can make an entire section of content disappear. In this context, JS resource errors are no longer trivial — they must be addressed even if the GSC screenshot looks fine since a timeout can mask a hydration failure.
Another exception: web fonts. Although they do not affect textual indexing, a systematic loading failure can signal a CORS or CDN issue that will impact user experience and, indirectly, behavioral signals. Google will not penalize for a missing font, but if your site becomes unreadable without it, you have a fundamental problem.
Practical impact and recommendations
What should you concretely do with these error messages?
First, don’t react impulsively. When you see "23 resources out of 112 could not be loaded", your first reflex should be to click on the details and identify which resources are involved. Look at the domains: if it's google-analytics.com, facebook.net, hotjar.com — close the tab and move on.
Next, check the rendering screenshot. It is the final arbiter. If the page displays correctly, with all textual content visible and a coherent DOM structure, resource errors are just noise. If the page is blank or incomplete, then you have a real problem to investigate — but this will be visually obvious, not via the count.
How do you distinguish a critical error from a false positive?
An error is critical if it concerns a resource that injects or structures content. Typically: the main CSS file (broken layout), the main JS bundle on a SPA (missing content), a REST API that feeds product listings on an e-commerce site. Everything else — analytics, third-party widgets, fonts, decorative images — can fail without indexing consequences.
For 'other error' messages, run multiple inspection tests at several hours apart. If the error is intermittent and the capture remains coherent, it’s a timeout of the tool. If it is systematic and correlates with degraded rendering, dive into server logs to identify a real latency or availability issue.
Which actions should be absolutely avoided?
Never block Google Analytics or Tag Manager via robots.txt "to avoid errors in GSC." This is a toxic misconception that still circulates. Google already ignores these resources at the rendering level — blocking them in robots.txt changes absolutely nothing and may even complicate debugging by masking legitimate error patterns.
Don't waste time optimizing the response time of third-party scripts that you do not control. If a Facebook pixel times out, you cannot do anything about it, and Google doesn’t care. Focus your efforts on your own critical assets: reduce your server's TTFB, optimize the size of your JS bundles, enable Brotli compression.
- Identify the domains of the errored resources — ignore third-party trackers (analytics, ads, social).
- Check the rendering screenshot in GSC — it’s the final arbiter, not the count.
- Test multiple times the URL inspection at several hours apart to catch intermittent timeouts.
- Only prioritize critical resources (main CSS/JS, content APIs) in case of recurring errors.
- Avoid blocking Google Analytics or Tag Manager in robots.txt — it's counterproductive.
- Monitor Core Web Vitals and TTFB rather than chasing every 'other error' message.
❓ Frequently Asked Questions
Les erreurs 'other error' dans Search Console peuvent-elles empêcher l'indexation de ma page ?
Dois-je corriger toutes les erreurs de ressources affichées dans l'inspection d'URL ?
Pourquoi Google affiche-t-il des erreurs sur des ressources qui se chargent correctement pour les utilisateurs ?
Comment savoir si une erreur de ressource impacte vraiment mon référencement ?
Faut-il bloquer Google Analytics dans robots.txt pour éviter les erreurs de ressources ?
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Other SEO insights extracted from this same Google Search Central video · duration 39 min · published on 17/06/2020
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