Google is sending notices to all the sites that have mobile-first indexing issues.
Google is sending out the messages via Google Search Console with “mobile-first indexing issues detected” notifications to webmasters. In those emails, it communicates the issues Google has when it comes to moving that site over to mobile-first indexing. This mail also says “Google expects to apply mobile-first indexing to all the websites in the next six to twelve months.”
Mobile-first indexing. Google first introduced mobile-first indexing back in November 2016 and by December 2018 half of all sites in Google’s search results were from mobile-first indexing. Mobile-first indexing simply means that Google will crawl your site from the point of view of a mobile-browser and use that mobile version for indexing and ranking.
All in on mobile-first indexing. Google is sending out emails now and those emails say “Google expects to apply mobile-first indexing to all websites in the next six to twelve months.” Here is a screenshot of the same.
The notices. Clearly Google is trying to be proactive and notifying the sites that are not yet moved over to mobile-first indexing with a specific message on what those sites need to do to become mobile-first indexing ready.
In this specific case, Kyle said the issue was with ”Missing image” is listed as an error, while “Page quality issue” and “Video issues” are warnings.”
Why do we care? If you get one of these notices it is likely a notice you should read and take care of it. If Google has issues with accessing your site with the mobile-crawler, then it might impact your indexing and ranking of your web pages in Google.