Shortcode

Snippets, don’t have a shortcode by default, as they should be PHP code which doesn’t directly produce output like you might have in a plugin or functions.php file.

If you do want to create a shortcode for a snippet, you can use this template:

add_shortcode( 'shortcode_name', function () { ?>

    SHORTCODE CONTENT

 <?php } );

Just replace shortcode_name with the name of the shortcode tag you want to create and SHORTCODE CONTENT with the HTML code or text you want to output.