One pair of head tag ( opening tag and closing tag) is used inside a page
The scripts kept within the head tag loaded first for use and by default scripts within the head tag or body content can use them.
Head tag comes before the body tags of the page and within the html tags of the page.
Here is a basic structure of the page
<!doctype html public "-//w3c//dtd html 3.2//en">
<title>(Type a title for your page here)</title>
<META NAME="DESCRIPTION" CONTENT="HTML body tags and how to use in webpage">
<META NAME="KEYWORDS" CONTENT="body tag, html body tag, tags in html">
<link rel="stylesheet" type="text/css" href="calendar.css" />
As you have seen how the head tag is used before body tags and stores various script and information about the page. Some of the important tags like title, script , style etc are kept inside this head tag.