In a nutshell, responsive web design is a technique which uses fluid layouts in addition to the CSS “@media queries,” which apply different style sheets based on the current screen size of the device. With responsive design, your website will fit virtually any device with a full browser: smartphones, iPad + other tablets (both landscape and portrait modes), and even TVs. It doesn’t matter that thr Galaxy Tab’s resolution is different from a Nexus S phone — your site will render beautifully, as long as responsive design was correctly implemented.
If you’re looking for some examples, here are 55 creative websites which are already making use of the power of media queries!