Introduction to Phantom Noindex Errors
Google’s John Mueller recently addressed a question about phantom noindex errors reported in Google Search Console. These errors occur when Google Search Console reports that a page is blocked from indexing due to a noindex directive, despite no visible noindex directive in the HTML code. Mueller confirmed that these reports may be real, and there are ways to troubleshoot and resolve the issue.
Understanding Noindex Directives
A noindex robots directive is a command that Google must obey, allowing site owners to control how Googlebot indexes their pages. However, it’s not uncommon for Search Console to report noindex errors on pages without visible noindex directives. This can be confusing, especially when the site owner or SEO has not intentionally added a noindex directive.
Causes of Phantom Noindex Errors
When Google Search Console reports a "Submitted URL marked ‘noindex’" error, it means that the site has asked Google to index the page via a Sitemap, but the page is sending a signal not to index it. This can happen when a noindex directive is present, but not visible in the HTML code. John Mueller suggested that in some cases, the noindex directive may only be visible to Google, making it difficult to debug.
Troubleshooting Phantom Noindex Errors
To troubleshoot phantom noindex errors, it’s essential to check the HTTP headers of the page. This can be done using online tools such as KeyCDN or SecurityHeaders.com. Additionally, checking the server response code can help identify if the issue is related to a caching plugin or CDN. For example, a 520 server response code from Cloudflare can indicate that the user agent is being blocked.
Checking HTTP Headers and Server Response Codes
To check HTTP headers, use online tools such as KeyCDN or SecurityHeaders.com. Look for any noindex directives or unusual server response codes. A 520 server response code from Cloudflare can indicate that the user agent is being blocked. Use multiple header checkers to ensure consistent results.
Using Google’s Rich Results Test
Another way to troubleshoot phantom noindex errors is to use Google’s Rich Results Test. This tool dispatches a crawler from a Google IP address, allowing you to see how Googlebot views the page. If the page is blocked by a noindex directive, the tool will report a "Page not eligible" or "Crawl failed" error. Clicking on the "View Details" link can provide more information about the issue.
Identifying Rogue Noindex Tags
If a rogue noindex tag is specifically written to block GoogleBot, you can use Google’s User Agent Switcher extension for Chrome or configure an app like Screaming Frog to mimic the GoogleBot user agent. This can help identify if the issue is related to a user agent-specific noindex directive.
Conclusion
Phantom noindex errors can be challenging to diagnose, but by following the steps outlined above, you can identify and resolve the issue. Remember to check HTTP headers, server response codes, and use Google’s Rich Results Test to troubleshoot the problem. By taking the time to investigate and resolve phantom noindex errors, you can ensure that your pages are properly indexed and visible to search engines.