Ads incrementality at scale

Context: Ads teams needed trustworthy lift estimates across markets without slowing delivery.

Constraints: Limited randomized control opportunities, shared budgets, and latency-sensitive bidding systems.

Actions and outcomes

  • Built a measurement plan combining geo experiments with CUPED adjustments and counterfactual simulations.
  • Added pre-launch checklists (overlap, power, guardrails) and post-launch monitoring for lift decay and spillover.
  • Delivered dashboards and templates that shortened experiment setup time by 30% while improving confidence intervals.

Artifacts

  • Geo-experiment playbooks and lift QA templates.
  • Shared libraries for treatment assignment, bucketing, and metric validation.
  • Patterns documented in the Causal measurement for ads pillar.

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