If your website isn’t mobile friendly, then you could see your search rankings dramatically drop in the next month or so.
Google has announced, that as of April 21st it will be expanding its use of mobile-friendliness as a ranking signal.
This change will have a significant impact on Google’s search results which means it could affect the performance of your site. If your site has not been designed or developed with mobile devices in mind, then you could see your search results reduce.
One of the reasons that Google has introduced this change, is that it will provide users with more relevant, high quality search results that are optimized for their devices.