A HTML document's title refers to the text that appears in the
tabs on a surfer's browser, basically it is the name of the page.
The tag to set the title goes in the HEAD section of the HTML
document, you add the tag:
<title>Your Title Goes Here</title>
Again, this belongs in the head, so like this:
<!doctype HTML>
<HTML>
<head>
<title>Your Title Goes Here</title>
</head>
<body>
Page content here
</body>
</HTML>