If your website isn't mobile-friendly, Google is penalizing your search engine rankings. On average, you're receiving 10% less traffic than you did prior to the Google change.
Recently Google announced changes to their search engine ranking algorithm:
“Starting April 21 , we will be expanding our use of mobile-friendliness as a ranking signal. This change will affect mobile searches in all languages worldwide and will have a significant impact in our search results. Consequently, users will find it easier to get relevant, high quality search results that are optimized for their devices.”
This means mobile-friendly responsive websites will score higher in Google results than non-responsive designs.