Ali Demirbaş - Lab
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Cart & Checkout

Testing Checkout Microcopy and Button Subtext

A short explanation or reassurance in checkout may help shoppers understand the next step and reduce hesitation.

  • Checkout
  • Purchase conversion rate (CR)

Option A vs Option B

The words in the slot are the variable.

Changed
Microcopy
Page
Checkout
Difference
changed

Hypothesis

Define one copy location and the exact wording in each arm before launch.

How to run this test

Primary metric

Purchase conversion rate (CR)

Compare purchases among all eligible checkout visitors assigned to each copy version.

Other metrics

  • CTA click-through rateCompare clicks on the CTA beside the copy being tested.
  • Relevant form completion rateMeasure completion of the checkout step where the copy appears.
  • Checkout abandonment rateCompare assigned visitors who leave checkout before completing an order.
  • Step completion timeMeasure time from viewing the copy to completing the next checkout step using the same events.

What to check before and during the test

  • CopyChoose one checkout microcopy location. Compare the existing line with a shorter, clearer version that communicates the same information; approve both texts before launch.
  • Keep constantLeave the CTA, price, visuals, placement and checkout flow unchanged.
  • BehaviorReview the related CTA or form-step interaction alongside purchase conversion.
  • AudienceNew and returning visitors can be reviewed separately using the same assignment rules.
  • Next testTest tone, placement or a different reassurance message separately.

Setup mistakes to avoid

  1. 1Do not use misleading, exaggerated or pressuring language.
  2. 2Keep the microcopy short and readable.
  3. 3Change only the selected line; do not change price or visuals at the same time.
  4. 4Keep the message relevant to the checkout step.
  5. 5Check that the copy does not crowd the mobile layout.