Reporting at a coarser level than execution

platform

A platform executes targeting at a fine geography (e.g. H3 r8 or zip+4) but only reports delivery at a coarse level (e.g. DMA or state), masking whether the fine-grained target was actually honored.

Detection

Reporting API's finest available geography dimension is coarser than the geography used at targeting time.

Mitigation

Request the platform's most granular reporting breakdown available, even if coarser than execution
Treat unverifiable fine-grain execution as an assumption to be validated by independent measurement (e.g. geo-lift test), not platform reporting

Affected conversions

Admin polygons → H3 (weighted crosswalk) weighted
H3 → platform-native IDs approximate