A Simple Example
<UL> <LI>paragraphs (P), <LI>unordered lists (UL), <LI>list items (LI), <LI>headings (H1 -- H6) </UL>
- paragraphs (P),
- unordered lists (UL),
- list items (LI),
- headings (H1 -- H6)
Tags mark blocks of text for meaning (paragraphs, lists, etc).
There are important rules for writing universally-accessible HTML documents. My book explains these rules, and how to use them.