how to add a favicon tag in html code example
Example 1: favicon HTML
<link rel="icon" href="yourIcon.png" type="image/png">
Example 2: head icon html
<link rel="icon" href="http://example.com/favicon.png">
Example 3: how to change tab icon in html
<link rel="shortcut icon" href="http://sstatic.net/stackoverflow/img/favicon.ico">