Responsive web design (RWD) is an approach to web design aimed at allowing desktop webpages to be viewed in response to the size of the screen or web browser one is viewing with. In addition it's important to understand that Responsive Web Design tasks include offering the same support to a variety of devices for a single website. Content, design and performance are necessary across all devices to ensure usability and satisfaction.
A site designed with RWD adapts the layout to the viewing environment by using fluid, proportion-based grids, flexible images, and CSS3 media queries. The fluid grid concept calls for page element sizing to be in relative units like percentages, rather than absolute units like pixels or points. Flexible images are also sized in relative units, so as to prevent them from displaying outside their containing element. Media queries allow the page to use different CSS style rules based on characteristics of the device the site is being displayed on, most commonly the width of the browser.
Responsive web design has become more important as the amount of mobile traffic now accounts for more than half of total internet traffic.
Responsive web design is a different way to design sites but it represents the future of where the web design technologies are going. Making website mobile compatible and tablet compatible.
Responsive web design is a design approach that is geared towards using one central site to provide the optimal browsing experience for multiple viewing platforms. The responsive web design uses W3C standards and CSS3 media queries with fluid proportion-based grids, to adapt the layout to the viewing environment, and also flexible images that would responsively adjust on-the-fly. As a result, users across a broad range of devices and browsers will have access to a single source of content, laid out so as to be easy to read and navigate with a optimal user interface, and minimize panning and scrolling.