But in some scenarios it is required that user should be redirected to some other URL after commenting. This can be done with a simple piece of code.
Open your active theme's functions.php file and add the following line at the end of the line.
function wp_comment_redirect_url($location) {
return "http://www.yourdomain.com";
}
add_filter('comment_post_redirect', 'wp_comment_redirect_url');
Now user will be redirected to the URL to have set.