The document discusses various HTML text formatting tags such as headings (<h1>-<h6>), paragraphs (<p>), centering content (<center>), line breaks (<br>), and horizontal rules (<hr>). It also covers presentational tags for bold (<b>), italics (<i>), underline (<u>), strikethrough (<strike>), monospaced (<tt>), superscript (<sup>), and subscript (<sub>) text. The document provides examples and attributes for many of these tags.