Conversion with Cart Data (CwCD)

What Is Conversion with Cart Data?

For e-commerce advertisers, raw revenue is often irrelevant when margin does not hold up. Conversion with Cart Data delivers the product details you need for margin-based optimization: which products were actually purchased, was there cross-selling, and was the transaction profitable? This data is the foundation for smarter bid strategies and better ROAS management.

Conversion with Cart Data (CwCD) is an enhanced conversion tracking method for e-commerce where you pass not just the transaction value but the full cart details to Google Ads. These include product IDs, quantities, unit prices, and total revenue per item. This data enables analyses that standard conversion tracking cannot provide.

The biggest benefit of CwCD is the distinction between directly advertised products and Cross-Sell Revenue. If a user clicks an ad for shoes but also adds socks and care products to the cart, CwCD shows you exactly what share of revenue came from the advertised product and what share arose from cross-selling. This delivers far more precise ROAS calculations.

Technical implementation requires your conversion tag to pass cart data in structured format. For Shopping campaigns, Google automatically links cart data to your Merchant Center feed. For optimization, CwCD means you can steer value-based bidding at the product level and gain better insight into the actual profitability of individual products and campaigns.