Entropy

Two channels, two very different returns at the margin.

Retailer · Meta vs PMax · Two geo holdouts · one channel paused at a time

Case studies · done with Services · Measurement

+9.1%projected total sales from reallocating budgetTwo geo holdouts · one channel paused at a time

What we found

Pausing Meta cost 7.2% of sales, at 19× incremental ROAS. Pausing PMax cost 6.0%, at 7× incremental ROAS. Meta returned 2.7 times what PMax did at the margin. Moving budget from saturated PMax to Meta projects 9.1% more sales in Q1, if Q1 behaves like the test months. We will know when Q1 closes.

Method

  1. 01

    Platform attribution showed strong returns on every channel but could not say which one would return more from the next peso.

  2. 02

    We ran two geographic holdouts, pausing one channel at a time. Each measured the sales lost when that channel went dark.

  3. 03

    We translated each loss into incremental revenue and incremental ROAS, then into a reallocation plan for Q1.

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