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ajay
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Asked: 2026-06-19T17:21:48+05:30 In:

What are crawl errors?

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Errors preventing search engines from accessing pages.

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1 Answer

  1. Pramendra Yadav
    Enlightened Founder @ NOIR & BLANCO

    Crawl errors are technical issues that prevent search engines like Google from successfully accessing, reading, or indexing pages on a website. When search engine bots (also called crawlers or spiders) cannot access important pages, those pages may not appear properly in search results, which can negatively affect SEO performance.

    In a Magento to Shopify migration, crawl errors often occur because website URLs, redirects, site structure, or technical settings change during the transition.

    Types of Crawl Errors

    1. 404 Errors (Page Not Found)
      • Occur when a page no longer exists or the URL has changed.
      • Common after migration if old Magento URLs are not redirected properly.
    2. Server Errors (5xx Errors)
      • Happen when the server cannot process a request.
      • Can prevent search engines and users from accessing pages.
    3. Redirect Errors
      • Occur when redirects are incorrect, create loops, or point to the wrong pages.
      • Can waste crawl resources and affect rankings.
    4. Blocked Pages
      • Pages are accidentally blocked by robots.txt or noindex settings.
      • Search engines cannot crawl or index important content.
    5. DNS Errors
      • Prevent search engines from finding the website due to domain or DNS problems.
    6. URL Errors
      • Incorrect URLs, broken links, or changes in website structure prevent proper crawling.

    Common Causes of Crawl Errors After Magento to Shopify Migration

    • Missing 301 redirects.
    • Changed product or category URLs.
    • Incorrect sitemap configuration.
    • Broken internal links.
    • Incorrect robots.txt settings.
    • Deleted pages without proper redirects.
    • Theme or app-related technical issues.

    Why Crawl Errors Matter

    • Reduce search engine visibility.
    • Cause important pages to disappear from search results.
    • Lower organic traffic.
    • Create poor user experience.
    • Affect sales and conversions.

    How to Find Crawl Errors

    • Google Search Console.
    • Bing Webmaster Tools.
    • SEO crawling tools such as Screaming Frog, Ahrefs, or Semrush.
    • Shopify analytics and SEO monitoring tools.

    How to Fix Crawl Errors

    • Implement proper 301 redirects.
    • Fix broken internal links.
    • Update XML sitemaps.
    • Remove unnecessary broken URLs.
    • Check robots.txt and indexing settings.
    • Regularly monitor website health.

    Example

    A retailer migrates from Magento to Shopify and changes product URLs. If old URLs are not redirected, Google finds hundreds of broken links and reports 404 errors. By adding correct 301 redirects, search engines can understand the new URL structure and preserve SEO value.

    In Simple Words

    Crawl errors are problems that stop search engines from accessing website pages. Fixing them quickly helps maintain SEO rankings, protect organic traffic, and ensure customers and search engines can easily access the Shopify store.