<!DOCTYPE html>
<html>
<head></head>
<body></body>
</html>
<head> (Document Metadata Container) contains document information. You can provide general information about the current document in the <head>, such as stylesheets, javascripts, search keywords, character encoding.
<title> (Document Title) defines the title of the document, shown in a browser's title bar or on the page's tab.
<body> (Document Body) frames the main content of a web page. All content needs to be within the <body> tags It's where all the stuff people actually see goes. Oh, and documents only have one <body> tag.
<h1>This is the most important header</h1>
<p>...</p>
<ul>
<li>List Item</li>
<li>List Item</li>
</ul>
<ol>
<li>List Item</li>
<li>List Item</li>
</ol>
<strong>This will display as bold text</strong>
<em>This will display as italic text</em>
<span style="color:red;">This text will be red</span>
<a href="https://etherpad.mozilla.org/simple-mdn">Simple MDN Definitions</a>
<img src="https://developer.mozilla.org/skins/mdn/Transitional/img/mdn-logo-sm.png"/>
<div>...</div>
<section>...</section>
<ul>
<li><a href="...">Link</a></li>
<li><a href="...">Link</a></li>
<li><a href="...">Link</a>
<ul>
<li><a href="...">Link</a></li>
<li><a href="...">Link</a></li>
</ul>
</li>
</ul>