Because of the proliferation of mobile devices (smartphones, tablets, laptops, and other intermediate forms) and widescreen displays, it has become increasingly vital to create websites and apps that can be viewed properly on a variety of screens (and resolutions).
In the area of web technology, this is referred to as responsiveness.
Responsive design is all the rage these days.
Websites for laptops and desktops were created expressly for this purpose. To make a website compatible for
each resolution, individual designs for different screen resolutions have to be created at the
start of this responsive design development. This style of development is no longer profitable now
that dozens of different screen resolutions are used.