Responsive web design (often abbreviated to RWD) is an approach to web design in which a site is crafted to provide an optimal viewing experience—easy reading and navigation with a minimum of resizing, panning, and scrolling—across a wide range of devices (from desktop computer monitors to mobile phones) i.e A website template that responds to the device mobile, tablet or desktop that accesses it and delivers the appropriate output for viewing is called responsive web design.
Below are infographics which will allow us to understand what responsive web design means.
Responsive Web Design Infographics
Responsive Web Design Infographics
Source : ticsyformacion.com, hallme.com