# Quality seal on product pages: +21.8% cart value

- Outcome: Won
- Page type: Product page (Ecommerce)
- Elements: Trust badges & security seals, Bestseller badges & product labels
- Test run by: [DRIP Agency](https://liftarchive.com/practitioners/drip-agency/)
- Commentary by: LiftArchive (our analysis, not theirs)
- Original source: https://dripagency.de/de/case-studies/mofakult
- Page: https://liftarchive.com/test/drip-mofakult-pdp-quality-seal/

Adding a quality seal to selected product pages lifted cart value by 21.8% for Mofakult, an online store for moped spare parts. DRIP Agency ran the test and published it as a case study on its German site. Only the headline figure was shared, so the exact metric is unclear.

## Result

**+21.8% cart value**

- Cart value: +21.8% against pages without the seal.
- The source does not say if this means average order value or cart value per session.
- Significance, sample size and which pages were included were not shared.

## Control

Selected product pages showed no quality seal.

## Variant

A quality seal was added to those same selected product pages.

## Why it likely won (our reading)

- Buyers of spare parts worry about fit and build quality. A seal gives a quick signal that the part is reliable.
- When shoppers trust the part, they may add more parts or pick higher-priced ones, which lifts cart value.
- The seal ran only on chosen pages, likely where quality doubts were strongest. That is our guess.

## Caveats

Facts come from DRIP's German case study, which gives only a headline figure. It is unclear whether the metric is average order value or cart value per session, and significance and sample size were not shared.

## How to run this test

- Hypothesis: If we add a quality seal to product pages where quality is a worry, then cart value will rise because shoppers trust the parts enough to buy more.
- Primary metric: Average order value
- Guardrail: Conversion rate
- Guardrail: Revenue per visitor
- Guardrail: Return rate
- Who should test it: Stores selling parts, tools or products where build quality is hard to judge online. Only use a seal you can back up. It is less likely to help brands that shoppers already know and trust.

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Credit: DRIP Agency ran this test and owns the result. Summary and commentary by LiftArchive (https://liftarchive.com/test/drip-mofakult-pdp-quality-seal/).
Usage: Free to use, quote and build on, with credit and a link: name the practitioner or organization that ran the test and link to its LiftArchive page. The results belong to the practitioners who ran and shared them; the summaries and commentary are LiftArchive's.