Google Mobile SERPs To Display Description Not Available If Googlebot Blocked

[engine]

Inadvertently blocking Googlebot could negatively impact your site in the SERPs. Assuming you want to appear in the mobile search results.

The message will read, "A description for this result is not available because of this site's robots.txt - learn more."

We’ve been seeing mobile websites that have that directive or that block access to critical resources such as JavaScript, CSS or images files. This prevents us from crawling and indexing their content properly.

For that reason, starting today, we’ll display a message in place of the description snippet for mobile search results blocking Googlebot for smartphones, just as we already do for search results blocking Googlebot .

Make sure Googlebot for smartphones can access and see your content properly. You can use the Fetch and Render as Google feature in Webmaster Tools, with the “Mobile: smartphone” option selected, to double-check that Googlebot for smartphones is not blocked. In addition, we strongly recommend not disallowing crawling of any CSS or JavaScript used on either the desktop or the mobile pages, so that we can recognize the pages appropriately.Google Mobile SERPs To Display Description Not Available If Googlebot Blocked [plus.google.com]

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[goodroi]

I'm a little surprised this wasn't done sooner.