The HTML <br> tag is mostly used when there is a need of inserting a line break inside a paragraph. This tag is applicable in writing poems and home address. It acts as an empty tag containing no content i.e. doesn't need end tag. Closing Bracket is optional in <br> tag.
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<p>This paragraph contains <br>a line break.</p>
<p>This paragraph contains <br>multiple <br>line breaks.</p>