This tag indicates to web browser software that the information that follows is in HTML code.

You need to use both an opening and a closing tag:

<html> – opening tag
</html> – closing tag

All other coding and document information should be between the opening and closing tags.

Exception: You may see a “document type” meta tag used at the beginning of a document before the <html> tag. This is a comment tag in a form similar to this

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

which indicates document type, HTML version, and/or other possible options.