A crawl error is not just a technical nuisance buried in a report. It can mean Google cannot reach a service page that drives enquiries, an old campaign URL is wasting authority, or a server problem is preventing important content from being discovered. That is why knowing how to fix crawl errors matters: the job is not to create a cleaner dashboard. It is to protect visibility, qualified traffic and revenue.
Not every crawl issue deserves the same response. A broken URL with no links, no traffic and no commercial purpose is rarely urgent. A 5xx error on a high-converting product category, however, needs attention now. Effective technical SEO starts with that distinction.
Start by separating crawl errors from indexing issues
Crawling is Google’s ability to request and access a URL. Indexing is its decision to store and show that URL in search results. The two are connected, but they are not interchangeable.
For example, a page blocked by robots.txt may be a crawl-access issue. A page returning a 404 status is a crawl failure. A page marked noindex can be crawled perfectly well but deliberately kept out of search. Likewise, a page labelled “Crawled – currently not indexed” in Google Search Console is not necessarily broken. Google reached it, then decided it was not sufficiently useful, distinct or important to index.
Treating all of these as “crawl errors” leads to wasted activity. Before changing anything, identify the actual status code, the URL’s purpose and whether it should rank at all.
Find the errors that can hurt performance
Google Search Console is the obvious starting point. Review the Pages report for URLs marked as not found, blocked, redirected, server error or affected by an access problem. Then use URL Inspection on priority pages to see how Google last encountered them.
Do not rely on Search Console alone. A full site crawl can uncover broken internal links, redirect chains, incorrect canonicals, orphan pages and URLs that are not appearing in Google’s reporting yet. Server logs add another useful layer, particularly on larger sites, because they show what search engine bots are actually requesting and how the server responds.
The point is to build a working list, not a long list for its own sake. For each issue, check whether the URL has organic sessions, backlinks, internal links, sitemap inclusion or a commercial role. Prioritise errors in this order:
- Pages that generate leads, sales or meaningful organic traffic.
- Pages with strong backlinks or high internal-link prominence.
- Templates that can create the same error across hundreds of URLs.
- Sitemap URLs that are meant to be indexed.
A single faulty rule in a CMS, migration setting or redirect configuration can do more damage than fifty obsolete URLs. Look for patterns before fixing individual pages one by one.
How to fix crawl errors by status type
Fix 404 errors with intent, not blanket redirects
A 404 means the requested page does not exist. That is not automatically a problem. If a URL was removed intentionally and has no replacement, returning 404 or 410 is often the correct outcome. It tells search engines to stop expecting content there.
The problem begins when a valuable page was deleted by mistake, an old URL still has backlinks, or internal navigation points visitors and crawlers to a dead end. In those cases, restore the page if the content is still needed or use a 301 redirect to the closest relevant replacement.
Avoid redirecting every missing page to the homepage. It creates a poor user experience and can look irrelevant to search engines. A discontinued service page should point to the current equivalent service, not a generic home page. If no close alternative exists, let the URL return a proper 404 or 410 and remove internal links and sitemap references.
Resolve 5xx server errors quickly
A 5xx status means the server failed to complete the request. These are among the highest-priority crawl errors because Google may reduce crawling if a site repeatedly appears unreliable. Visitors may also see an error at the exact point they are ready to enquire or buy.
Common causes include overloaded hosting, database failures, application conflicts, restrictive firewalls, poorly configured CDNs and timeout limits that are too aggressive. Intermittent errors can be particularly difficult because the page may load when your team checks it but fail when Googlebot reaches it.
Review hosting logs, uptime data and the affected time periods. Check whether the problem is isolated to a page template, a location, a device type or a surge in traffic. If bot protection or a firewall is blocking legitimate crawlers, adjust the rule carefully rather than weakening site security across the board. The answer is stable access, not a shortcut that creates another risk.
Correct redirect errors and chains
Redirects are normal after a site redesign, URL change or content consolidation. Poorly managed redirects are not. A redirect loop prevents the destination from loading. A long chain slows crawling and risks losing value along the way. A redirect pointing to another broken URL simply moves the problem.
For important URLs, aim for one direct 301 redirect from the old page to the best live equivalent. Update internal links so they point to the final destination rather than relying on redirects. Also replace old URLs in XML sitemaps, canonical tags, paid campaigns and key marketing materials where practical.
Use 302 redirects only when the change is genuinely temporary. Leaving a supposedly temporary redirect in place for years creates ambiguity for search engines and makes future maintenance harder.
Review robots.txt and access restrictions
Robots.txt can prevent crawlers from accessing areas of a website. This is useful for low-value parameter pages, internal search results, staging sections and duplicate paths that should not consume crawl attention. It is damaging when it blocks product pages, service pages, CSS or JavaScript files needed to render content properly.
Check the exact URL pattern rather than assuming the file is the issue. A broad disallow rule can accidentally block a whole folder after a redesign. Also inspect password protection, login requirements, geo-blocking, cookie walls and firewall rules. If Google cannot receive a normal response, the page cannot compete reliably.
Do not use robots.txt as a replacement for noindex. A blocked page may still appear in search results if Google finds it through links, but with limited information. If a page must remain accessible to users while staying out of the index, allow crawling and apply an appropriate noindex directive.
Clean up sitemap and canonical conflicts
Your XML sitemap should contain canonical, indexable URLs that return a 200 status. It should not be a dumping ground for redirects, 404s, noindex pages, duplicate filter URLs or pages blocked from crawling. Sending mixed signals wastes time for both Google and your team.
Canonical tags need the same discipline. Each indexable page should generally declare itself as canonical unless there is a clear duplicate relationship. If Page A canonicalises to Page B, but the sitemap promotes Page A and internal links favour it heavily, Google receives contradictory instructions. It may choose a different canonical or ignore the signal altogether.
This matters most on e-commerce and large content sites, where faceted navigation, pagination and URL parameters can multiply crawlable variations. There is no universal setting that suits every platform. The right approach depends on whether those variations serve genuine search demand or merely create duplicates.
Validate fixes before you move on
A technical fix is only complete when it works for users and crawlers. Test the affected URL in a browser, confirm the HTTP status code, crawl the site again and inspect the URL in Search Console where relevant. For redirect changes, test both the original URL and the final destination.
Then monitor the pattern, not just the individual page. If a CMS plugin created 404s once, check whether new pages are still being generated incorrectly. If hosting caused server errors during peak periods, measure whether reliability holds during the next traffic spike. Technical SEO is operational work. One-off clean-ups without process control tend to unravel.
Keep crawl health tied to commercial priorities
Crawl reports can become an exercise in chasing zero errors. That is activity, not necessarily effective marketing. A website will always have retired URLs, bot requests for nonsense paths and low-value technical noise. The goal is not perfection on paper. The goal is to ensure search engines can consistently discover, render and index the pages that support your acquisition strategy.
Build crawl checks into monthly SEO reporting, and make them more frequent during migrations, website launches, platform changes and major content programmes. Cash Cow Marketing treats this as part of the wider performance system: search visibility brings the right prospects in, and a fast, accessible website gives those prospects a reason to act.
When an error appears, ask one commercially useful question first: what valuable page, customer journey or source of authority is at risk? That question will tell you whether to fix it immediately, monitor it, or leave an intentionally retired URL alone.