If you have tracking code, custom CSS or JavaScript libraries, extra meta information, or anything else you’d like to add to your site’s <head> section, you can do so by copying and modifying this Code Snippet:
add_action( 'wp_head', function () { ?>
<!-- paste your <head> code here -->
<?php } );Similarly, if you would like to add code wich is supposed to go in the site footer, just before the end of the <body> section, you would do so like this:
add_action( 'wp_footer', function () { ?>
<!-- paste your footer code here -->
<?php } );