No CSS partner set up — paying full Google Shopping CPC on every click
The UK is one of the few markets where Google Shopping operates under a CSS (Comparison Shopping Service) framework, a result of European antitrust rulings that still apply in post-Brexit UK. UK stores can route their Shopping campaigns through a CSS partner instead of Google Shopping directly, which typically reduces cost-per-click by 15 to 20 percent on the same impressions. Most UK Shopify and WooCommerce stores have never set this up. They are paying the standard rate when a lower structural rate is available and permitted by Google.