Analyzing Hydrogen experiment funnels in GA4
Our wider ecommerce team lives in GA4, all the checkout funnel reports are built there. We just launched our first Croct experiment on our Hydrogen storefront and I want to segment those existing funnels by which variant each visitor saw.
Does Croct send variant data over to GA4, and if so what exactly flows? Also keen to hear about any gotchas before I promise the team dashboards that dont hold up.
1 answer
Yes, this is exactly what the GA4 integration does. It is a one-time, no-code connection between the two projects, and after that Croct streams the audiences a visitor fits, the experiences that impacted them, the experiments they participated in, and the variants they were assigned into GA4. From there you can slice your existing checkout funnels by variant like any other dimension.
Two things to watch out for, both GA4-side limits:
- GA4 drops events beyond 100k per user per day, which mostly matters for very heavy automated sessions.
- High-cardinality dimension values get grouped under "(other)" in reports, so if you run many experiments at once some values can collapse there. There is a good rundown of these in GA4 caveats when segmenting by Croct dimensions.
Because of those limits, treat GA4 as the secondary view for funnel context. The Croct-side experiment results stay unsampled, so use them as the source of truth when calling a winner.