PANEL / DMP-BASED MEASUREMENT
Control group
A panel universe, or any user who did not see the campaign
Real, not-yet-exposed people from the campaign's own target audience
Data source
Modelled segments plus cookie or ID matching
Direct survey responses
Timing
After the campaign, in delayed waves
While the campaign is running, instantly
Privacy dependency
Depends on third-party cookies and device ID matching
Independent — no third-party cookie matching
Media cost
PSA or holdout sacrifices impressions
Zero — no impressions or budget given up
Optimisation
None; results arrive after the flight ends
Live, from the week-2 mid-term wave onward
Transparency
A weighted final score
Raw counts and open methodology on a live dashboard
A panel is a separate universe; matching a campaign to it is an inference. Recall also decays, so a delayed wave measures memory bias as much as effect.
METHODOLOGY IN ONE LINE
Relative uplift = ((Exposed% − Control%) ÷ Control%) × 100
CONTROLUnexposed users from the campaign's own target audience — no PSA, no holdout line
SIGNIFICANCE≥10% relative uplift reported as significant; every percentage shown with its respondent count
TIMELINEKickoff parallel with setup · mid-term wave in week 2 · final report two days after the flight ends