Responsive Website Design is basically related to developing a website that can be accessed from any device using the same URL address. These responsive websites displays the same quality of content on all devices and ensures that no compromise is made on the content quality throughout, irrespective of the view and the size of the device.
In other words, we can say that the content remains the same, but it rearranges itself to change according to the device. The Responsive website design runs on the client-side so that the browser can download the entire web page, and modify its size according to the screen.