In HTML Head Used some following elements or tag.
  • <title>
  • <style>
  • <link>
  • <base>
  • <meta>
  • <script>
HTML <head> tag is  a container for the above element.

HTML <head> Tag

HTML <head> tag use in between <html> tag and <body> tag.
HTML metadata no display in web page. Metadata is a data about HTML document. Metadata is a character set, title, style, and other meta information.

HTML <title> Tag

HTML <title> tag is used to define a title of  web page document. HTML <title> is very important for search engine (SEO) Search Engine Optimization. 

The <title> Tag:-
  1. It defines a title in browser tab.
  2. It display a title for page in search engine result.
  3. It provides for page when it is added to favorites
Example:-
 
<!DOCTYPE html>  
<html>  
<head>  
  <title>This is a Page Title</title>  
</head>  
<body>  
<h1>HTML Language Study</h1>  
</body>  
</html>  

HTML <link> Tag

The HTML <link> tag defines a relationship between HTML document and an external resources. 
The <link> tag is used to connect external style sheets (CSS).
The <link> use in between <head> tag.

Example:- 
 
<link rel="stylesheet" href="filename.css">

HTML <style> Tag

The <style> tag used to define a style in HTML document. Tag used in between <head> tag. <style> tag design a single page.

Example:-

<!DOCTYPE html>
<html>
<head>
  <title>Page Title</title>
  <style>
    body {background-color: pink;}
    h1 {color: orange;}
    p {color: red;}
  </style>
</head>  
<body>
<h1>This is a Heading</h1>
<p>This is a paragraph.</p>
</body>
</html>

HTML <meta> Tag

The <meta> tag is typically used to specify the character set, page description, keywords, author of the document, and other metadata web page.
The metadata is not display in web page but browser used.

Example:-

Define the character set used:
<meta charset="UTF-8">

Define keywords for search engines:
<meta name="keywords" content="HTML, HTML Tag, HTML  Layout">

Define a description of your web page:
<meta name="description" content="Blogger">

Define the author of a page:
<meta name="author" content="Ansari">

Refresh document every 30 seconds:
<meta http-equiv="refresh" content="30">

Setting the viewport to make your website look good on all devices:
<meta name="viewport" content="width=device-width, initial-scale=1.0">

All Used between <head> tag.

Example:-

<meta charset="UTF-8">
<meta name="keywords" content="HTML, HTML Tag, HTML  Layout">
<meta name="description" content="Blogger">
<meta name="author" content="Ansari">
<meta http-equiv="refresh" content="30">
<meta name="viewport" content="width=device-width, initial-scale=1.0">