‘Responsive website design’ these words are lesser known or should I say, not as popular as SEO (Search Engine Optimisation) but as important as SEO. Let us understand the term in the way it is expressed in other words, the technical definition of responsive website, Responsive Website design is the approach that suggests that design and development should respond to the user's behavior and environment based on screen size, platform and orientation. The practice consists of a mix of flexible grids and layouts, images and an intelligent use of CSS media queries.