It’s not you – it’s Google…. You probably at this point received (or soon will receive) an email from your Webmaster Tools account that warns you “Googlebot cannot access CSS and JS files.” This is no cause for major alarm – here is the reason why you are receiving and the fix.

What? Google just ‘refreshed’ their Panda algorithm to 4.2. Although the full scope of what this refresh entails the industry considers it a rather small update, affecting about 2-3% of search queries (as opposed to last Sept update affecting 4-5%). However,

Why the CSS/JS Error? The error you are seeing is mostly likely because 1) you are using WordPress as your CMS, and 2) your CSS/JS is being ‘disallowed’ in the robots.txt. Google is basically saying it wants to see your CSS/JS and disallowing crawling of Javascript or CSS files in your site’s robots.txt directly harms how well their algorithms render and index your content and can result in suboptimal rankings.

Next Steps: If you are not sure about indexing of Javascript, CSS and other formatting in your website then you can confirm it by using Fetch And Render As Google in webmaster tools. If you see “Complete” as a result there is nothing left to do because whole content is indexed. If you see ‘Partial’ or ‘Redirected’ you can check blocked scripts, files and stylesheets by clicking on results. Based on the results you can update your robots.txt file.

Or, you can contact us and we’ll be happy to assist. Jeff Molitor