Did you get an email from Google saying Googlebot can’t access your CSS and JS files? Well, you are not alone.
Google is notifying these webmasters because almost a year ago, Google began rendering the full page as a user would see it. In October they changed their webmaster guidelines to inform webmasters to not block include files.
The rational, if Google cannot fully see your web site, it may result in Google not fully understanding your web site, leading to “suboptimal rankings,” as Google put it.
Here is a picture of the notification that may look familiar to you:
If you received this notification, follow the instructions in the email to diagnosis the issue and/or use the fetch and render tool within the Search Console to see what Google sees and open up those assets to Google. That is – if you want Google to access them.