Should a website be full-width?
Websites look way better when they're able to stretch and fill the width of the screen: Full-width websites look more modern by comparison. They make better use of the space available when viewed on larger screens. If your site is still in boxed layout, consider a website redesign featuring full-width content.
How do I get full-width in CSS?
The width property is used to fill a div remaining horizontal space using CSS. By setting the width to 100% it takes the whole width available of its parent. Example 1: This example use width property to fill the horizontal space. It set width to 100% to fill it completely.