b
I. Description
The HTML b element is used to designate the enclosed text as worthy of extra attention. Most web browsers render text which is enclosed in the b element as bold.
II. Examples
<!DOCTYPE html>
<html>
<head>
<title>Example Page</title>
</head>
<body>
<h1>HTML Description</h1>
<p>
Hypertext Markup Language which is often abbreviated as HTML
is a <b>markup language</b>. <b>Markup languages</b> are
typically used to encode information or data, but they differ
significantly from <b>programming languages</b> which are
languages suitable for controlling computers and directing how
programs should execute on a physical or virtual central
processing unit (CPU).
</p>
</body>
</html>