Question How to see which is your global rating?

@papablopoulus,

You should use the hook code below. Just make little customizations: 

add_action('wpdiscuz_add_rating', function($rating, $post_id) {
    $r_post = get_post($post_id);
    $post_title = $r_post->post_title;
    $post_url = get_post_permalink($post_id);
    $headers = [];
    $fromName = "From Name";
    $fromEmail = "no-reply@yourdomain.com";
    $toEmail = "youremail@example.com";
    $headers[] = "Content-Type: text/html; charset=UTF-8";
    $headers[] = "From: " . $fromName . " <" . $fromEmail . "> \r\n";
    $subject = "Rating Added";
    $message = "Your message here";
    wp_mail($toEmail, $subject, $message, $headers);
}, 15, 2);

This article should be helpful for you: https://www.wpbeginner.com/plugins/how-to-easily-add-custom-code-in-wordpress-without-breaking-your-site/