HTML<tt> tag was used to define text that should be displayed in a monospaced or fixed-width font, typically resembling typewriter text. The abbreviation "tt" stands for "teletype," which refers to the old teletype machines that used monospaced fonts.
HTML tt tag
The <tt> tag is not supported in HTML5, which means it is no longer to use in modern web development. Instead, you should use CSS to achieve the same effect.
<p>The tt tag <tt> Not supported in HTML5 </tt> </p>
HTML tt tag Alternative Using CSS
<p>Sakalacode <span style="font-family: monospace;">HTML tt tag Alternative Using CSS</span></p>