Each personalization shows an experience to an audience and keeps part of that audience on the original, so you can measure whether it helps.
Shipping costs shown in Belgium and Switzerland: Paused by Probant at the week 2 check: the personalized share was doing worse than the holdout (-22.9%, range -45.5 → -0.3 points, entirely below zero).
ReviewEvaluated in this order: a visitor sees the first one whose audience matches them, or its holdout.
| Order | Personalization · audience | Status | Reach 7 d | Difference vs. holdout · range |
|---|---|---|---|---|
| 1 | Express delivery for loyal mobile shoppers | Live | 19,342 | +12.6% |
| 2 | Welcome code for Instagram visitors | Live | 1,681 | |
| 3 | Shipping costs shown in Belgium and Switzerland | Paused | 0 | -22.9% |
| 4 | Size guide for visitors from search | Draft | — |
“Related products” does better for returning visitors: +8.29% on “Add to cart”, versus -5.96% for everyone else.