Responsive Web Design (RWD) is a device-independent UI (user interface) design philosophy that aims to develop and deliver an optimized website experience on devices with different widths and different resolutions: PC, notebook, tablet, smart phone, etc. It is a technology using which web designers code the style sheets of the website in a manner that its layout magically adjusts itself to more comfortably fit the width of the browser in which it is being viewed.
A responsive website is a single website that adapts to the device of each unique visitor, whether desktop, smartphone, or tablet. A responsive website dynamically re-sizes its content and imagery for a variety of different screen sizes in order to ensure the website is effective and easy to use on any device.
In traditional marketing, for significant impact, businesses would launch advertising campaigns that will reach the maximum number of people. The principle stays true to the internet marketing. Building a website is basically aimed at making an online presence. As more people are accessing the net using a variety of gadgets, it is only sensible that you adjust to the trend of internet usage.