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Home & Landing

Welcome Takeover Screen on Page Load: A/B Test Idea

A prominent welcome overlay can focus attention on one message or offer, but it also adds a step before the page. Because only the overlay arm has a close action, closing it cannot be a shared success event. Define the same meaningful interaction with the underlying page for both arms.

A/B test scenario. This page is a test plan, not the result of a real experiment.

  • Home & landing
  • Continuation rate

Control vs Variant

Absent on one side, present on the other.

Changed
Presence
Page
Home & landing
Difference
added

Hypothesis

If one message or offer covers most of the screen on arrival, attention may settle on it, but visitors have to take an extra step before they reach the page. That could raise the continuation rate when the message is relevant, or lower it when the extra step costs more than the message gives.

Test plan

Calculate sample size

When to run this test

Heatmaps that skip the offer area, session recordings of visitors who never scroll to it, or support questions about a missed offer suggest a single homepage message or offer is going unseen. If the overlay draws attention as intended, visitors notice the message, get past it and still reach the same meaningful interaction with the page below. If the offer is noticed but draws no interest, look at the offer itself first. Also confirm before launch that the overlay does not hide the main content from search bots, which matters most on pages that get search traffic.

How to measure success

Continuation rate

Measure the same predefined interaction with the page below per assigned visitor; do not compare overlay dismissal with page load.

Also track

  • Page exit rateCompare exits among visitors assigned to the opening overlay.
  • Offer acceptance rateReport acceptance among eligible assigned visitors in the variant; the control has no equivalent offer.
  • Time to reach main contentMeasure time from page load to first meaningful interaction with the main content consistently in both arms.
  • Repeat visit rateCompare all eligible assigned visitors over the same follow-up period.

How to set it up

  • OverlayAdd one dismissible opening overlay that covers a predefined share of the screen.
  • MessageKeep one message or offer fixed and preserve the page content below.
  • DismissalProvide a visible, usable close control.
  • TimingUse the same opening trigger throughout the test; delayed display is a separate test.
  • Visitor historyDefine eligibility and review new and returning visitors separately.

What to watch when reading the result

  1. 1Closing the overlay has no counterpart in the control, so it cannot count as success. Base the call on the continuation rate into the same interaction with the page below; if offer acceptance climbs while page exits rise or time to reach main content grows, do not ship.
  2. 2This overlay size, this message and this opening trigger bound the result; if you change the size and the content in the same test, you cannot tell which one caused the difference. Split new and returning visitors in the readout, and compare repeat visits across all assigned visitors over the same period.
  3. 3A result from an overlay that hides its close control, is hard to tap on mobile or comes back in the same session after a visitor closed it does not show the overlay's real effect. Check the setup on mobile too, respect a visitor's dismissal and do not push anyone into accepting the offer.
  4. 4When the arms land close together, the cost of the extra step and the pull of the message may be canceling out. Check with the sample size calculator how much traffic it takes to detect a gap of that size, and do not read an underpowered result as support for the overlay.

Frequently Asked Questions

Does closing the welcome screen count as success?

No equivalent action exists in control. Use meaningful continuation into the underlying content as the primary outcome, measured across all assigned visitors.

What limits should the welcome screen respect?

Provide an accessible close control and respect dismissal. Avoid covering the main content on mobile search entry pages, where intrusive interstitials can affect search visibility.

How can its delay to content be measured?

Use the same start and first meaningful content-interaction events in both arms. Report exits and return visits across assigned visitors, with predefined new and returning-user breakdowns.

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