1) One-third of all webpages are now viewed on mobile devices, nearly doubling over the past year, as Americans spend more time online via their smartphones than desktop computers. 2) Responsive website design provides a low-cost alternative to separate mobile websites by creating a single website that dynamically adapts to different screen sizes, improving the user experience across devices. 3) Google has begun penalizing non-responsive websites in search rankings and endorses responsive design which helps search engines properly index content regardless of device.