With the growing use of mobile devices, Google seems to have taken a step to let publisher improve their mobile friendliness so that users are not affected.
Starting 21 April 2015, Google Search will be expanding its use of mobile friendliness as a ranking signal. This change will affect mobile searches in all languages worldwide and will have a significant impact on Google Search results. Users will find it easier to get relevant, high quality search results optimised for their devices.To test if your site is mobile friendly, you may use the Mobile-Friendly Test tool. Just input your website's URL and hit analyze. This test will analyze your URL and report if the page has a mobile-friendly design.