Site visitors expect the sites they visit to function on all of their devices and they don’t have the patience for slow loading sites or sites that don’t function easily. To maintain your rankings in the search engines and convert visitors into customers, it is critical that your site be mobile friendly.
Responsive design uses your content and one codebase to display the content across various screen resolutions, device types, and interaction models in an easy to read format. In simple terms, the site looks great and functions well, regardless of the device it is viewed on.
If your site doesn't come up on top, you are losing traffic and sales to your competitors.