With current trends between 50% – 70% of search engine traffic are conducted on mobile devices ranging from smart phones to tablets.
Google Mobile Responsiveness
Google has now announced that they will start ranking the mobile friendliness of a website in its rankings. This could seriously impact on your website if it is not mobile friendly (or responsive), therefore mobile friendly website will from 21st April start to rank higher than those that are not mobile responsive.
To check if your site is mobile friendly, check your website in this Google tool: