Currently, more than 58% of American adults own a smartphone and almost 60% of all website traffic is from mobile devices. In fact, there are currently more mobile devices on earth then their are people. And every month mobile usage continues to grow, so every month more and more prospects and customers will view your website from a mobile device. If their experience viewing and interacting with your site is poor, they’ll likely have a lower option of your brand, and they’ll also be more likely to visit a competitor’s site.
Responsive development is Google’s recommended approach for mobile web design. Per Google, responsive websites will perform better in search rankings because they provide a better user experience than sites that are not mobile friendly. Additionally, Google likes that responsive sites use single URLs versus different URLs for separate mobile versions of websites.
Furthermore, mobile phones now have a seperate Google search algorithm as well, so just because your site ranks high via a desktop search doesn’t mean it will continue to rank well for individuals for perform the same search via their phone.