Responsive web design is an approach to web design

Responsive web design is aimed at allowing desktop webpages to be viewed in responce to the size of device from which webpages are viewed.

The site which is designed with Responsive web design adopts the layout for the viewing environment by using Fluid, Proportion based grids, fkexible images and CSS3 media queries.

Responsive web design has become more important as the amount of mobile traffic is half of total internet traffic