The <link> element can be used to include an external style sheet file in your HTML document.
An external style sheet is a separate text file with .css extension. You define all the Style rules within this text file and then you can include this file in any HTML document using <link> element.
Consider a simple style sheet file with a name new.css having the following rules:
h1, h2, h3 { color: #36C; font-weight: normal; letter-spacing: .4em; margin-bottom: 1em; text-transform: lowercase; }
Now you can include this file new.css in any HTML document as follows:
<head> <link type = "text/css" href = "new.css" media = " all" /> </head>