21st April 2015 is the day when your Website should be complete and focused on mobile, if not you will lose rankings
To quote Google directly
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.
In short if you website has not been optimised for Google Mobile search results then you will lose rankings and your site may not be visible on the Google Search results for mobile technology. The reasoning is simple to give users a better experience when browsing on their device. With more increase on mobile technology and the expansion of 4G it is much more likely that the user on your site will come to you via their mobile device and therefore Google have made their search results to mirror this.
Getting your website mobile friendly may require a few pieces of code in certain files or it may need to be re developed completely , either way if you are unsure then contact us direct and we can discuss this with you /