Responsive Web Design is a condition of web page that it design compatible & good looking in any devices with different screen resolution. It means the web page is still good looking when you access it from PC, Tablet, Smartphone and mobile. For example, when you access this site from different devices (PC/Tablet/Mobile), you will see the design is adapting to device resolution . By default, the web page which is designed for PC won't compatible when it accessed from mobile.
