/* Importing from Google Fonts. These have to be at the top! */
@import url('https://fonts.googleapis.com/css2?family=Roboto+Condensed:wght@300&display=swap');

/* These will depend on your user’s platform and browser. */
li:nth-child(1) { font-family: serif; }
li:nth-child(2) { font-family: sans-serif; }
li:nth-child(3) { font-family: monospace; }
li:nth-child(4) { font-family: cursive; }
li:nth-child(5) { font-family: fantasy; }

/* You can also choose a specific typeface. */
li:nth-child(6) { font-family: 'Futura', 'Verdana', sans-serif; }
/* But the user has to have them installed on their device. */
/* Otherwise it will “fall back” to the next/right value. */

/* The `@import` above lets you use this on any computer.  */
li:nth-child(7) { font-family: 'Roboto Condensed', sans-serif; }

/* You can also host fonts along with your site files. */
@font-face {
	font-family: 'Playfair';
	src: url('playfair--regular.woff2') format('woff2');

/* And then reference them, as above. */
li:nth-child(8) { font-family: 'Playfair', serif; }
<!DOCTYPE html>
		<title>Font family</title>
		<link href="style.css" rel="stylesheet">
			<li>Default serif</li>
			<li>Default sans-serif</li>
			<li>Default monospace</li>
			<li>Default cursive, you don’t see this much</li>
			<li>Default fantasy, maybe don’t do this</li>
			<li>Futura, on a Mac; Verdana, on a PC</li>
			<li>Some condensed Roboto, imported from Google Fonts</li>
			<li>This will be in Playfair, using @font-face</li>
		<style>li:not(:first-child) { font-size: 18px; margin-top: 0.666em }</style>