http://www.trifectaky.com/web-design.php
This is important in today's technological landscape. With the prevalence of smart phone and tablet use to access the Internet, good business practice demands that websites take this into account and plan for it. This is where responsive design takes over and solves most compatibility issues.

The Impact of Responsive Design: Mashable has gone as far as to say this is the beginning of the Post-PC Era. And in many important ways, this is no understatement. If you're tech-savvy, it comes as no surprise that PC sales are finally declining, in the wake of smartphone and tablet advancements. This evolution is occurring so fast that the coming year may see mobile take over half of the Internet access market.