What exactly lands in GA4 from the Croct integration, and any caveats?
Before I enable the GA4 export I want to know the exact payload, not a marketing summary. What categories of data does Croct send, and do I need to plan custom dimensions upfront? Changing them later is painful.
Also interested in GA4-side limits that could bite us. We have a fairly high-traffic property and I have been burned by cardinality issues before
2 answers
The integration streams four categories of data into GA4 for each visitor:
- The audiences the visitor fits.
- The experiences that impacted them.
- The experiments they participated in.
- The variants they were assigned.
Setup is a one-time, no-code project connection from the Croct dashboard. There is nothing to instrument in your site code. On the Croct side, several events can be tracked within 2-3 milliseconds, so the export does not add meaningful latency to your pages.
Two GA4 limits are worth planning around:
- GA4 drops events beyond 100k per user per day. Croct's per-user volume is far below that, but if you already send heavy custom instrumentation, keep the combined total in mind.
- GA4 groups high-cardinality dimension values under "(other)" in reports. Keeping audience and experiment names concise and stable avoids losing detail to that bucket.
The GA4 page in the Croct integrations catalog covers the connection steps and the same caveats.
Adding a practical note from our rollout: register the custom dimensions in GA4 before you start looking for the data, otherwise the parameters arrive but you cannot break reports down by them retroactively for exploration defaults. And resist the temptation to encode metadata into experiment names (dates, ticket numbers, etc). Every unique value counts toward cardinality, and that is exactly what pushes reports into the "(other)" row on busy properties.