CSS is a stylesheet language that is used to describe how HTML elements should be displayed on a page. CSS rules are made up of selectors and declarations.

Standing for cascading style sheets, CSS files are used inside browsers to load rules for stylizing a web page's elements with the help of the CSS language.

Large CSS files can pose challenges, such as slowing down the site and making maintenance more complex.

While CSS files apply style instructions to general areas such as the background and the main document text, some CSS template files specify certain tags that may not match the tags in your document.

Another CSS performance optimization tip is similar to splitting a CSS file into multiple, device-specific files. Instead, you can also shrink the size of the webpage itself, reduce the number of DOM ...