Conversion API for Google Analytics 4 on Shopify

What is Conversion API?

Server-to-server data sharing with ad platforms. For Shopify brands running Google Analytics 4 campaigns, understanding this concept is critical because it directly impacts how you evaluate Google Analytics 4's contribution to your revenue.

Why Google Analytics 4's view of conversion api is misleading

• GA4's data-driven model assigns credit using machine learning, but it cannot observe the counterfactual
• Last-click models give 100% credit to the final touchpoint regardless of whether earlier channels created demand
• Position-based, linear, and time-decay models divide credit by rules you did not derive from data

How causal inference measures conversion api for Google Analytics 4

• Causal inference on the natural variation in your GA4 data (paused channels, spend changes, promotions)
• Incremental ROAS per channel: what would have sold without each channel
• Confidence intervals so you can size decisions correctly