WordPress at a glance
filter is not described

notify_moderator filter-hook . WP 4.4.0

Filters whether to send the site moderator email notifications, overriding the site setting.

Usage

add_filter( 'notify_moderator', 'filter_function_name_5735', 10, 2 );
function filter_function_name_5735( $maybe_notify, $comment_ID ){
	// filter...

	return $maybe_notify;
}
$maybe_notify(true/false)
Whether to notify blog moderator.
$comment_ID(int)
The id of the comment for the notification.

Where the hook is called

wp_notify_moderator()
wp_new_comment_notify_moderator()
wp-includes/pluggable.php 1609
$maybe_notify = apply_filters( 'notify_moderator', $maybe_notify, $comment_id );
wp-includes/comment.php 2037
$maybe_notify = apply_filters( 'notify_moderator', $maybe_notify, $comment_ID );

Where the hook is used (in WP core)

Does not used.