Most Shopify brands running Google Ads are staring at two different truths. Google Ads says one ROAS. Shopify's order data says another. Neither tab talks to the other, so you end up eyeballing the gap and hoping it's close enough.

Learning how to connect Google Ads to Shopify analytics fixes that guessing game, but it's not a single toggle. There are a couple of native paths, each with real limits, and a point where most growing brands stop trusting the manual setup entirely. Here's the whole thing, step by step, plus where it breaks down.