Responsive Web Design: your website will automatically resize and conform to whatever screen size and resolution you have. This means that if you’re viewing a website from a desktop and from an iPhone, it will relatively look and operate the same. All utilizing one design. A separate mobile website will no longer be required. Since mobile web browsers are accounting for an ever-increasing amount of website traffic, Responsive Web Design adds years to any website design.
Another positive for Responsive Web Design is that it cuts down on the need for mobile apps and the costs associated with them. Any website function, whether it’s a cart or interactive database, can process all information through responsive design display.
Take a look at this site from your phone, iPad, Kindle and other devices, it will look and feel exactly the same across each device.