<br>
Force a line break, the rare cases where it is legitimate
<br> — The line break
The <br> element inserts a line break within a block of text. It is not for visual spacing (that is CSS's job) but for marking a break that is an integral part of the content.
When to use it
Legitimate cases are rare: a postal address, a poem, song lyrics. In these cases, the line break is part of the text's meaning. If you just want space between blocks, use CSS margins or separate <p> elements.
What you gain
Accessibility: screen readers pause at each <br>. Used correctly, this respects the natural rhythm of the content (lines of a poem, lines of an address).
Code example
<address>
42 Rue des Exemples<br>
75001 Paris<br>
France
</address>