Responsive web design means that a website displays the same way on any device, i.e. no matter if it’s on a mobile, tablet or desktop device. Mobile internet usage is soon expected to overtake desktop usage. That means that soon more people will be browsing the internet on mobile devices – like smartphones and tablets – than on desktop computers.
If you have a website then you want to make sure that it displays properly, whether it’s on a mobile smart phone, tablet or on a desktop computer. You don’t want to miss this train, snooze and you will lose. Here is a good infographic that outlines what responsive web design is.