Almost everything in HTML is a tag describing the meaning of text. Even the web page itself needs to be surrounded with a tag saying that this is a web page. That tag is the HTML tag. At the very top of the document, type “<html>”. At the very bottom of the document, type “</html>”.
This is what HTML tags look like: a tag name between angle brackets surrounding some text, and then the same tag name with a slash in front of it to end the text. Use all lower case for your HTML tags. HTML recommends it, and XHTML requires it.
The main part of your web page—the part that people actually see when they’re visiting at your web page—is the body of the document. Surround all of the text—inside the HTML tags—with “<body>” and “</body>”. The body is where the meat of the document goes. All of the information that you’re giving to the reader goes in the body.