The client's starting goal
Vehicle rental company in three markets, with three booking sites, one GA4 property per market and a GTM container shared with about thirty brands. 30% of purchases came in without a transaction ID, and business parameters (rental length, booking lead time, branch) had been empty since the start of the year: no way to know which campaign sold what.
Key actions
We pulled every GA4 purchase, market by market, identified the cause of each data gap, then built the fix plan with the client and its developers.
- Full review of GA4 purchases, market by market
- Cause of each gap identified: missing ID, empty parameters, duplicates
- Custom reports and business parameters back in service
- Fix plan approved with the client and its developers
The impact
The review quantifies and dates what is missing: 34.5% of revenue that cannot be attributed, or 158 purchases and €34,293 in one month in a single market.
The fix plan is approved by the client and its developers, with custom reports to track the data as it comes back.



