Mobile phones and tablets are responsible for 57% of global internet use. A great to make sure your website can be viewed using many different devices: desktops, tablets, and phones. Your web page should look good, and be easy to use, regardless of the device. Responsive web design makes your web page look good on all devices. Web pages should not leave out information to fit smaller devices, but rather adapt its content to fit any device: It is called responsive web design when you use CSS and HTML to resize, hide, shrink, enlarge, or move the content to make it look good on any screen.