All plays
When to use it
When shoppers on mobile product pages (mobile share above 40%) scroll well past an above-the-fold add-to-cart button and click rate trails other product pages.
How to run it
Pin a sticky add-to-cart bar (product name, price, button) to the bottom of the screen once the original button scrolls away.
Why it works
Make the action easier to complete
Shoppers decide mid-scroll, and making them hunt back up loses orders. GrowthRock's published A/B tests of sticky add-to-cart on mobile PDPs measured +5.2% and +6.5% orders at 97-98% significance.
Source: GrowthRock sticky add-to-cart tests