<!DOCTYPE html>
<title>Page Title</title>
<h1>This is a Heading</h1>
<p>This is a paragraph.</p>

The <!DOCTYPE html> declaration defines this document to be HTML5
The <html> element is the root element of an HTML page
The <head> element contains meta information about the document
The <title> element specifies a title for the document
The <body> element contains the visible page content
The <h1> element defines a large heading
The <p> element defines a paragraph