We use the HTML <b> tag or the HTML <strong> tag to make text bold. For example,
<b>This text is bold.</b>
<br>
<strong>This text is also bold.</strong>
Browser Output
HTML <b> vs <strong> Tag
Both <b> and <strong> tags make the text inside them bold and there is no difference in how browsers render these tags.
However, the <strong> tag is a semantic tag that indicates the text content is of strong importance, seriousness, or urgency (for example, Warning! Falling rocks) whereas the <b> tag has no semantic meaning and only makes the text bold.
Hence, it is generally preferred to use the HTML <strong> tag.
Note: You can also use the CSS property font-weight to make the text bold.