From 21st April 2015 Google will start rewarding mobile friendly websites in the search rankings. This will apply to all mobile searches from this date onwards, read more here: http://googlewebmastercentral.blogspot.co.uk/2015/02/finding-more-mobile-friendly-search.html
To test if your site is mobile-friendly take the test now: https://www.google.com/webmasters/tools/mobile-friendly/
Having a mobile friendly site has many other benefits including improving page speed and usability. Research shows that a responsive web design converts more visitors to sales on mobile devices.
Contact us for more advice and assistance.