This document discusses various HTML tags for formatting text, including tags for superscript, subscript, centering text, pre-formatting text, and striking out text. It explains that the <SUP> and </SUP> tags are used to display text as superscript above the line, while <SUB> and </SUB> tags display text as subscript below the line. The <CENTER> tags are used to center text within a row. The <PRE> tag displays text in the browser exactly as formatted in the HTML document, and the <STRIKE> tag strikes out text. Hands-on exercises are provided to practice using these tags.