Google announced it will expand its mobile-friendly initiative that will impact your rankings. How your website is built for mobile visitors (beyond your content and backlinks), will now be a major factor.
On April 21st, Google will incorporate mobile-friendliness as an important ranking signal. They indicated that the update will be world-wide and have a “significant impact” in its search results.
“As more people use mobile devices to access the internet, our algorithms have to adapt to these usage patterns.” – Google Webmaster Central Blog