Websites should always be designed and developed to work in the fluid environment of continuously evolving devices and channels, whether "responsively" designed or otherwise. For many years it has been the web designers and web developers that have been breaking the inherently responsive nature of the web by placing their designs within fixed containers.
Responsive website design can be simply described as an approach to design by which the intent is to provide the most optimal viewing experience on all devices. Elaborated, this includes ease-of-use whereby there is minimal user involvement, by way of resizing, panning and scrolling, across a wide array of devices (from personal computers to mobile devices).
When budgets are limited, web product owners can face a daunting task of deciding which SmartPhone device to support first. With market share changing so rapidly, this can be a difficult decision. We've pulled together some statistics on SmartPhone use to help with these kinds of choices.