Product: Sticky Call To Action on Product Page
Hypothesis
If we make the primary call-to-action sticky and always visible while scrolling, then conversion rates will improve because the CTA remains accessible at the exact moment users decide to act
Test Results
Key Learning
Context: Key actions on the product disappear as users scroll, creating a gap between intent and the ability to act.
What was tested: Sticky CTAs capture conversions from users who reach purchase intent mid-scroll rather than requiring them to scroll back up; the lift depends heavily on page length and scroll depth This large-scale test (805,623 visitors) provides strong statistical confidence in the directional findings.
Result: No statistically significant difference was detected. CTA changes that don't move the needle often mean the bottleneck is elsewhere — consider testing the surrounding context or the value proposition instead.
How to Apply This to Your Site
This experiment tested product: sticky call to action on product page but produced no statistically significant change. The test was run on a product page page in the cross-industry industry. Inconclusive results suggest this particular change may not be a priority — focus testing effort on higher-impact areas.
Before you test: Consider that cta tests typically require large sample sizes to detect small effects. Run your test for at least 2 full business cycles to account for weekly traffic patterns.
What Was Tested
A floating Add to Basket button was added to a product page. Impact on sales was measured.
Methodology
Build On These Learnings
Save your own experiments, spot winning patterns across your test history, and stop repeating what's already been tried.
Related Experiments
Product: Single Or Alternative Buttons
Context: The primary call-to-action on the product isn't converting at its potential — design, copy, or placement may be the bottleneck.
Listing: Filled Or Ghost Buttons
Context: The primary call-to-action on the listing isn't converting at its potential — design, copy, or placement may be the bottleneck.
Listing: Visible Payment Options
Context: The primary call-to-action on the listing isn't converting at its potential — design, copy, or placement may be the bottleneck.
Checkout: Sticky Call To Action
Problem: Key actions on the checkout disappear as users scroll, creating a gap between intent and the ability to act.