What is Responsive Web Design?

Responsive web design is an approach to web design that makes web pages render well on a variety of devices and window or screen sizes

Main purpose of it is to adjust to different size of devices. So in other world, on the PC you should see one design and on the mobile phone other

Responsive design is an approach to web page creation that makes use of flexible layouts, flexible images, and cascading style sheet media queries. The goal of responsive design is to build web pages that detect the visitor’s screen size and orientation and change the layout accordingly.

Responsive Web 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

Responsive Webdesign are those designs which will run on your desktop system, laptop, tablet and mobile etc. properly when they load. Responsive websites are displayed properly in any resolution. You should have proper CSS for working of the responsive site.

A typical website is comprised of a set of files (each web page—home page, about page, etc.—is an individual file). Each file contains HTML code and content (text and images). Web pages are styled with files called Cascading Style Sheets (CSS).

Almost every new client these days wants a mobile version of their website. It’s practically essential after all: one design for the BlackBerry, another for the iPhone, the iPad, netbook, Kindle — and all screen resolutions must be compatible, too.

An approach to web design that makes web pages render well on a variety of devices and window or screen sizes. Content, design and performance are necessary across all devices to ensure usability and satisfaction

sometimes i usually use this for online check .. ami(dot)responsivedesign(dot)is

Responsive web design is an approach to web design that makes web pages render well on a variety of devices and window or screen sizes. Recent work also considers the viewer proximity as part of the viewing context as an extension for RWD.

Responsive web design (RWD) is an approach to web development where a site's layout and content automatically adjust to fit any screen size or device. By using a single flexible code base, it eliminates the need to build and maintain separate websites for desktop and mobile users.