head.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <!-- characters used will be of UTF-8 -->
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <!-- content will be didplayed in highest compatibility mode -->
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- to encourage responsive design -->
    <meta name="description" content="This is description">
    <meta name="keywords" content="html, html tutorials, web developement">
    <meta name="robots" content="INDEX, FOLLOW">

    <!-- use of meta tag is for search engine optimization. -->

    <title>head Theory</title>

    <link rel="stylesheet" href="head.css">
    </link>
    <!-- for including external css -->

    <script src="head.js"></script>
    <!-- for including external javascript -->

</head>

<body>
    We will learn about head tag.
</body>

</html>