HTML
All HTML documents, including those in frames, have a title element in the head section that defines in a simple phrase the purpose of the document. This helps users to orient themselves within the site quickly without having to search for orientation information in the body of the page.
Note that the (mandatory) title element, which only appears once in a document, is different from the title attribute, which may be applied to almost every HTML element.
This example defines a document's title.
<!doctype html>
<html lang="en">
<head>
<title>The World Wide Web Consortium</title>
</head>
<body>
...
</body>
</html>
title element appears in the head section.title element describes the document.