# Sticky mobile CTA on partner sign-up page: +36% registration clicks

- Outcome: Won
- Page type: Signup page (Lead-gen)
- Elements: Sticky cta, Mobile
- Test run by: [Booking.com](https://liftarchive.com/practitioners/booking-com/)
- Commentary by: LiftArchive (our analysis, not theirs)
- Original source: https://wingify.com/success-stories/booking-com-partner-hub-mobile-growth/
- Page: https://liftarchive.com/test/booking-com-partner-hub-sticky-mobile-cta/

Adding a sticky call-to-action bar to Booking.com's mobile 'Join now' page for property owners raised clicks to start registration by 36%. Booking.com's Partner Hub team ran this A/B test, and it was published as an AB Tasty / Wingify case study. The result led to a full rollout.

## Result

**+36% registration clicks**

- Clicks to start registration on mobile: +36%.
- The team rolled out the sticky bar to all mobile visitors.
- The metric is clicks to start registration, not completed registrations or listed properties.
- Sample size, test length and confidence level were not shared.

## Control

A long, content-heavy 'Join now' page on mobile, with the registration button only in fixed places on the page.

## Variant

A sticky bar kept the registration button on screen as visitors scrolled through the page on mobile.

## Why it likely won (our reading)

- On a long page, people read for a while and then lose track of where the button was. A sticky bar is always one tap away.
- Close to half of Partner Hub traffic is mobile, where scrolling back up to find a button is more effort.
- Property owners make the decision while reading, so the button needs to be there when they are ready.

## Caveats

Measures clicks to start registration, not finished sign-ups. No sample, duration or significance was shared.

## How to run this test

- Hypothesis: If we keep the sign-up button visible in a sticky bar on our long mobile landing page, then more visitors will start registration because they can act the moment they decide.
- Primary metric: Clicks to start registration on mobile
- Guardrail: Completed registrations
- Guardrail: Scroll depth
- Guardrail: Lead or partner quality
- Who should test it: Lead-gen and B2B sign-up pages that are long and read mostly on phones. It adds little on short pages where the button is always in view.

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Credit: Booking.com ran this test and owns the result. Summary and commentary by LiftArchive (https://liftarchive.com/test/booking-com-partner-hub-sticky-mobile-cta/).
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.