The importance of Responsive Design
Mobile devices are rapidly becoming the predominant consumer choice, with adoption increasing daily as PC sales diminish in response. Designing your digital site for desktop or laptop, as well as tablets and smartphones within a single codebase, is called responsive design.
The promise of responsive design? A single, digital site optimized for devices with various screen sizes. With so much information and so many content types, communicating key messages effectively is a challenge.
Source: SourceForge Feb. 2015