WooCommerce

Tracking

Would advise to use the Google Tag Manager for WordPress (Plugin) instead!

Tracking URL

/checkout/order-received/

Tracking via hook

goes in theme's function.php

add_action( 'woocommerce_thankyou', 'wc_value_tracking', 50 );

function wc_value_tracking( $order_id ) {

   $order = new WC_Order( $order_id );
   $order_total = $order->get_total();
   echo "<script>dataLayer.push({'order_id' : '<?php echo $order_id ?>', 'order_value' : '<?php echo $order_total ?>', 'event' : 'order-submitted'});</script>";

}

Feed

If the client is using the official woocommerce feed plugin this can be checked by using the query parameter:

www.example.co.uk/?woocommerce_gpf=google

extra GET variables for use:

&gpf_start=0
&gpf_limit=100