Site diagnostics

Yandex.Webmaster monitors the quality of your site and warns you if it finds any errors.

The site is checked daily. The Yandex.Webmaster page displays errors that were detected during the day. To view the dynamics for recent diagnostics, click Other days.

Information about errors doesn't affect the site's ranking or indexing. This information is advisory, except for the “Fatal” and “Critical” categories. However, we do recommend making note of any messages that are displayed for your site.

Type of issue Description Note
Fatal Checks the server connection, site availability for indexing, security and compliance with the

These issues may lead to lower rankings or exclusion of the site from the search results.

You should monitor them and fix them as soon as possible

Critical Checks the expiration date of the site's domain, the number of broken internal links, and server response time
Possible issues Checks the validity of the Sitemap and robots.txt files, settings for displaying non-existent files, the presence of redirects, the number of duplicate pages, and so on May affect the quality and speed of site indexing
Recommendations Usually includes suggestions for improving the site's ranking in search results Use them to improve the site's representation in search results

Issues related to site optimization for mobile devices

View the recommendations for optimizing sites for mobile devices.

Description of the issue in the interface Note
Site cannot be considered optimized for mobile devices because the main page is not optimized. Go to Tools → Audit pages for mobile compatibility in Yandex.Webmaster to view more detailed information. With this tool, you can check how mobile-friendly specific pages of your site are.
Site cannot be considered optimized for mobile devices, as the main page could not be loaded for audit. Check the server settings and, if necessary, contact the hosting provider.

Most likely, the main page was unavailable when the Yandex robot was checking it.

Check the main page in Tools → Audit pages for mobile compatibility in Yandex.Webmaster. If the audit is passed successfully, submit the site to be rechecked in the Troubleshooting → Site diagnostics section. To start the recheck, click Check next to “The site is not optimized for mobile devices”.

Site cannot be considered optimized for mobile devices as 90% of requested pages could not be loaded for checking. Check the server settings and, if necessary, contact the hosting provider.

Most likely, the pages were unavailable when the mobile robot was checking them.

Check individual pages in the Tools → Audit pages for mobile compatibility section. If the audit is passed successfully, submit the site to be rechecked in the Troubleshooting → Site diagnostics section. To start the recheck, click Check next to “The site is not optimized for mobile devices”.

Many pages are not optimized for mobile devices

The site is considered to be optimized for mobile devices if the number of non-optimized pages is below a certain threshold. The limit is calculated dynamically depending on the number of indexed pages on your site.

If you see this message, the threshold was exceeded for the site. We recommend that you edit the pages from the list provided in Yandex.Webmaster. After making changes, check individual pages in the Tools → Audit pages for mobile compatibility section in Yandex.Webmaster. If the audit is passed successfully, submit the site to be rechecked in the Troubleshooting → Site diagnostics section. To start the recheck, click Check next to “The site is not optimized for mobile devices”.

Many pages with different content redirect to the same page of the mobile version of the site

We don't recommend to make redirects from a number of pages of the main version to the same page of the mobile version. It can confuse the users of mobile resources.

Yandex.Webmaster lists the pages that have different content but redirect users to the same page of the mobile version. In this situation, we recommend that you set redirection to corresponding pages of the mobile version.

If this is impossible (for example, the content from several pages is combined on one page of the mobile version), you can leave only redirects from the main page or from some pages where they are appropriate.

Could not load the site for Audit. Site cannot be considered optimized for mobile devices

This message signals that the Yandex mobile robot failed to access your site's pages.

Check your resource settings, such as the robots.txt file. In the server logs, Yandex's mobile robot is indicated as Mozilla / 5.0 (iPhone; CPU iPhone OS 8_1 like Mac OS X) AppleWebKit / 600.1.4 (KHTML, like Gecko) Version / 8.0 Mobile / 12B411 Safari / 600.1.4 (compatible; YandexMobileBot / 3.0; + http: // yandex .com / bots)

There are no auditable pages, so the site cannot be checked and considered optimized for mobile devices Contact the Support service for help on this issue.