Responsive Web Design

a.k.a. RWD, Responsive Website Design, responsive design, user interface plasticity
An approach to website design that enables web pages to “respond automatically” to your screen size and render the text and images easily viewable. Responsive means that it fits on three screens: mobile, tablet and desktop.

Websites overlay CSS code to take the same content and make it easily viewable on all screen sizes, using what's known as adaptive design layouts and fluid grids. Instead of seeing a desktop version of a website on your mobile device, you'd see a mobile version automatically, which also means that if creating a mobile-specific website or app is out of budget, online publishers can still deliver a great experience through responsive design.  

Historical perspective: When Google announced Mobilegeddon in 2015, and started to boost the ratings of sites that are mobile friendly if the search was made from a mobile device, Responsive Web Design become more important, especially since the amount of mobile traffic for the first time accounted for more than half of total Internet traffic.

NetLingo Classification: Net Programming