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Sitewide 'FREE SHIPPING' sticky banner: +8% purchases

WinnerSite-wide
G
Test run byGrowthHitCRO agency
Commentary byLiftArchiveOur analysis, not theirs

Adding a sitewide sticky banner announcing free shipping lifted completed purchases by 8%.

GrowthHit ran this A/B test for a beauty ecommerce store where almost every product already shipped free, and it was published as a Convert case study. The result was reported at 90% confidence.

+8% purchases
  • Completed purchases: +8%.
  • Confidence was 90%, a lower bar than the usual 95%.

The change

Control (A)
header
nav
hero
collection grid
footer
Variant (B)
Sticky FREE SHIPPING bannerNEW
header
nav
hero
collection grid
footer

Variant adds a sticky free shipping banner across the whole site.

Simplified mockup drawn by LiftArchive from the shared screenshots.

Control

The original site, with no emphasis on free shipping.

Variant

A sticky banner announcing FREE SHIPPING, shown on every page and every device.

Why it likely won

Our reading of the result, not the practitioner's claim.

  • Exit polls and surveys showed shipping cost was the top worry, even though nearly everything shipped free. Shoppers simply did not know.
  • A sticky banner keeps the message in view on every page, so it reaches people before they abandon.
  • Clearing up a doubt costs nothing to fulfil here, because the offer already existed.

Caveats: The test ran for 15 days with 26,306 visitors per version, and the result was called at 90% confidence. A true lift may be smaller than 8%.

Who ran it

GrowthHit ran this test for an anonymized ecommerce store where almost every product already shipped free and published the results (Convert.com case study). The numbers are theirs; the summary and commentary on this page are ours.

Read the original case study on GrowthHit →

How to run this test on your store

Hypothesis
If we state free shipping on every page, then more visitors will buy because surveys show shipping cost worries cause abandonment.
Primary metric
Completed purchases
Guardrails
  • Average order value
  • Revenue per visitor
  • Mobile bounce rate
Who should test it
Stores that already offer free shipping but do not say so clearly, especially if surveys mention shipping costs. If shoppers already know shipping is free, a banner adds little.

Questions

Does a free shipping banner help if shipping is already free?

It can. In this test shoppers worried about shipping costs that did not exist, and stating the offer clearly lifted purchases.

How do I know if shipping costs are a problem?

Ask. An exit poll or short survey of people who leave without buying will show whether shipping comes up.

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