On April 21st, Google is rolling out an update that will improve mobile search results. In effect, this will also penalise those website that are not optimised for mobile devices. For full details of the announcement read this Google page: Google mobile advice page
To ensure your site is still appearing in Google’s mobile search results after April 21st, run your site through the testing tool. If your website passes, you shouldn’t have anything to worry about and your site will still show up in mobile searches.
If your website doesn’t pass the analysis, then the tool will recommend improvements that you need to make. You can use your Webmaster Tools account to get a full list of mobile usability issues across your site using the Mobile Usability Report.
For more advice on this and to find out how we can help you avoid being penalised in Google mobile search results, please fill out our contact form.