Social proof under ATC matched to ad angle: +12.70% conversion
Test run byDave DiederenSyntra Labs
Commentary byLiftArchiveOur analysis, not theirsMatching the social proof line under the add-to-cart button to the ad a visitor clicked raised conversion rate by 12.70% and revenue per visitor by 9.74%. Dave Diederen ran this test. Average order value fell 2.63%.
- Conversion rate rose 12.70% (2.44% to 2.74%), about 759 extra orders a month by the dashboard's estimate.
- Revenue per visitor rose 9.74% ($1.15 to $1.26), about $27,483 a month.
- Average order value fell 2.63% ($47.22 to $45.98). This is a small drop, but worth watching.
- The conversion range runs from 0% to +27%, so the lift is likely real; the revenue range dips below zero.
The change
The proof line under the button changes to match the visitor's ad.
Simplified mockup drawn by LiftArchive from the shared screenshots.
Control
Every visitor saw the same generic line under the add-to-cart button, "Trusted by 200K+ customers".
Variant
The line under the button changed with the ad angle. Speed-focused visitors saw proof about fast results, ingredient-focused visitors saw proof about quality, and social-angle visitors saw the customer count.
Why it likely won
Our reading of the result, not the practitioner's claim.
- paid traffic arrives for different reasons, and generic proof speaks to none of them directly.
- proof that echoes the ad makes the page feel like a continuation of what drew the visitor in.
- placing it right under the button gives a final, relevant nudge at the moment of decision.
Caveats: Sample size and duration were not shared. The dashboard labels the variant "With Social Proof", so the exact control setup may differ from the post's description.
Who ran it
Dave Diederen (@DaveDiederen) shared this test on X. The numbers and screenshots are theirs.
View the original post on X
How to run this test on your store
- Hypothesis
- If we match the social proof line under the add-to-cart button to the ad angle a visitor came from, then more visitors will buy because the proof speaks to their reason for clicking.
- Primary metric
- Conversion rate
- Guardrails
- Average order value
- Revenue per visitor
- Bundle or subscription take rate
- Who should test it
- Brands running paid ads with clearly different angles that land on the same product page. It won't help much if most traffic is organic or all ads share one message.
Questions
Should social proof change based on the ad a visitor clicked?
In this test it helped. Matching the line to the ad angle lifted conversion rate 12.70%.
Where should social proof go on a product page?
Here it sat directly under the add-to-cart button, in the same spot for both versions. Only the message changed.
Did matched social proof affect order value?
Average order value fell 2.63%, but revenue per visitor still rose 9.74%.
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