PrestaShop Ghost Tracking: Anatomy of a Data Disaster
Missing purchases, phantom conversions and contradictory reports. When PrestaShop modules, cache and GTM collide, Google Ads optimises noise instead of real sales.
Why PrestaShop tracking breaks
Third-party modules and aggressive cache layers make tags fire twice, not at all, or only on some browsers.
Typical symptoms
- Google Ads conversion counts ≠ Analytics e-commerce transactions
- Smart Bidding learns on duplicated or missing purchase events
- ROAS swings that track tag changes more than real sales
The fix
Map every tag and module. Strip redundant pixels. Rebuild a clean data layer. Align Google Ads primary conversions with one trusted source of truth — then re-enable value-based bidding.
FAQ
Why does PrestaShop struggle more than Shopify on tracking?
Heavy module ecosystems and cache layers often inject or block tags unpredictably.
Should I trust Google Ads or Analytics numbers?
Neither blindly. Align both to a single clean purchase event and reconcile with the order backend.
Want a free Google Ads audit?
Request free audit