By default if you enable the Dynamic Remarketing Conversion tracking ( Woocommerce ) it takes the id of the product
If you need to send the SKU a simple hack can change this
Open the woocommerce-sea.php file and
you will fine this
if ($ecomm_pagetype == “product”){
if ( ” !== $product->get_price()) {
$ecomm_prodid = get_the_id();
please change this to
if ($ecomm_pagetype == “product”){
if ( ” !== $product->get_price()) {
$ecomm_prodid= $product-> get_sku();