HTML tags are the hidden keywords that define how you order and display element and content. Most HTML tags have two parts, an opening, and a closing part:

Note that the closing tag has the same text as the opening tag, but has an additional forward-slash ( / ) character.

There are some exceptions, such as the HTML tag <img> that does not have a closing tag:

<tagname>Content</tagname>

To view an HTML document, you'll need a web browser such as Google Chrome, Mozilla Firefox, Internet Explorer, or Safari.