Pages, Like People, Have a Head and a Body

The Head

The head contains information that is not displayed in your browser. It has metadata (data about data) tags that can tell a search engine or another program more about the file, like who wrote it or what keywords are relevant, such as:

What language or character set you're using: <meta charset="utf-8">

What the page title should be: <title>HTML!</title>

What CSS and JavaScript files to include (and where they are): <link rel="stylesheet" href="style.css">