
Google’s Search Advocate, John Mueller, has provided valuable insights into how Google Search Console handles 404 errors, redirects, and site migration issues. His explanation, shared in response to a Reddit user’s frustration over ranking drops during a website migration, offers clarity on common misconceptions and practical advice for addressing these challenges.
The Reddit user detailed their efforts to resolve issues following a site migration, including fixing technical problems, redirecting 404 pages to proper URLs, and submitting changes for validation in the Search Console. Despite these steps, they noticed delays in validation updates and continued ranking declines, prompting them to seek advice from the SEO community.
In his response, Mueller clarified that the “mark as fixed” feature in Search Console does not speed up reprocessing. Instead, it serves as a tool to track the status of flagged issues. He explained that this feature allows site owners to monitor Google’s progress but does not influence the pace of reprocessing.
Mueller emphasized that not all flagged 404 errors require action. If a page intentionally returns a 404 status because it no longer exists, this is a valid and correct approach. Seeing these pages flagged in the Search Console does not indicate a problem. However, for unintentional 404 errors, such as those caused by broken links, he recommended fixing the issue through proper redirects, ensuring pages return a 200 (OK) status code, and updating internal links.
He also addressed the timeline for Google to reprocess site changes, explaining that the duration depends on several factors. Recent updates, made within a few days, are typically processed quickly. However, larger sites or older issues may take significantly longer to be reflected in the Search Console.
Mueller outlined best practices for handling redirects and updates during migrations. These include setting up accurate redirects, updating internal links to point to new URLs, and refreshing sitemaps to signal changes to Google. He highlighted the importance of patience, particularly for large-scale migrations, as reprocessing may take time.
404 errors, often misunderstood, were another focus of Mueller’s explanation. He clarified that intentional 404s for non-existent pages are acceptable and do not require further action. For unintentional 404s, addressing the root cause is essential to maintain site health.
Mueller’s insights underscore the importance of understanding how Search Console operates and managing expectations around its validation process. While it is a valuable tool for tracking issues, it does not provide instant fixes or expedite reprocessing.
Website migrations are inherently complex and can impact search rankings if not handled carefully. By following Mueller’s advice and adhering to best practices, webmasters can navigate migrations more effectively, address technical issues comprehensively, and ensure a smoother transition.
Patience, proper implementation, and a clear understanding of Search Console’s capabilities are key to preserving site health and minimizing disruptions during migrations. Mueller’s guidance serves as a reminder that successful migrations require a combination of thorough planning, technical accuracy, and realistic expectations about the time needed for changes to take effect.

Jessica Jones
Jessica Jones is a talented writer at J Morgan Marketing, where she excels in creating compelling and engaging content tailored to meet the unique needs of clients. With a keen understanding of digital marketing strategies, Jessica crafts narratives that not only captivate audiences but also drive brand growth. Her expertise spans across various content forms, from blog posts and articles to social media and SEO-driven copy, ensuring that every piece resonates with its intended audience and contributes to the overall marketing goals. Passionate about storytelling and innovation, Jessica is dedicated to helping brands connect with their audience through powerful and effective content.