<mark> to highlight
The <mark> element represents a span of text that is highlighted.
<!DOCTYPE HTML>
<html>
<head>
<title>Example</title>
</head>
<body>
<mark>HTML</mark> is <mark>cool</mark>.
</body>
</html>
The mark element with additional CSS
<!DOCTYPE HTML>
<html>
<head>
<title>Example</title>
<style>
mark {background-color: #0F0; font-weight:bold;}
</style>
</head>
<body>
<article> <header>
<h1>Something in Latin</h1>
</header>
<p>Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac
turpis egestas. <mark>Vestibulum tortor quam</mark>, feugiat vitae,
ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam
egestas semper. Aenean ultricies mi vitae est. Mauris placerat eleifend
leo.</p>
</article>
</body>
</html>