Campaign overview in order table

gistfile1.txt

<?php

// Add new columns to the order table
add_filter('manage_edit-shop_order_columns', 'add_custom_order_column', 20);
function add_custom_order_column($columns) {
    $columns['utm_source'] = __('Campaign', 'woocommerce');
    return $columns;
}

// Populate the new columns with UTM data
add_action('manage_shop_order_posts_custom_column', 'display_custom_order_column', 20, 2);
function display_custom_order_column($column, $post_id) {
    if ($column === 'utm_source') {
         echo get_post_meta($post_id, '_wc_order_attribution_utm_source', true);
		 echo '<br/>';
		 echo get_post_meta($post_id, '_wc_order_attribution_utm_medium', true);
		 echo '<br/>';
		 echo get_post_meta($post_id, '_wc_order_attribution_utm_campaign', true);
    }
}
?>