The use of mobile devices to search the web is growing at an enormous pace, but most websites are not optimized for such mobile devices. With a growing array of screen sizes available across phones, tablets and desktops and newer inventions everyday, constraints will only continue to change.
It is important that your website is as adaptable as today’s technology; Responsive web design changes the appearance of a website dynamically, depending on the screen size of the device being used. The technology uses breakpoints to determine how the layout of the website will appear: one design is used above and another below that breakpoint. The breakpoints are usually based on the width of the browser.