Is Your Website Mobile Optimized? Google Search Results Look at Mobile Websites First

Did you know that Google looks at all mobile websites first when indexing and ranking content for search results?
The best way to make sure your site is mobile optimized is to use responsive design. Google themselves confirm that using responsive design is one of the best ways to instantly optimize your search rankings.
With responsive design, you are serving the same content to both desktop and mobile users, so there’s never a discrepancy between content.
In other words, you’re telling Google that nothing has changed and to continue ranking as usual.