We design websites which are functional for the users on any platform..
Responsive Web Design has developed over the past few years to become a device agnostic approach to delivering content to users. From a mobile browser on an iPhone all the way up to a HDTV, responsive websites are able to adjust their appearance based on screen dimensions. We can no longer design for a desktop screen with the number of devices and different screen sizes that are available today; and also those that will come tomorrow.
Makes it easier for users to share and link to your content with a single URL.
Helps Google's algorithms accurately assign indexing properties to the page rather than needing to signal the existence of corresponding desktop/mobile pages.
Requires no redirection for users to have a device-optimized view, which reduces load time. Also, user agent-based redirection is error-prone and can degrade your site's user experience.