Implementing a sticky "Add to Cart" button on mobile increased the add-to-cart rate by 8.7%. Discover how this change impacted other key metrics.
Mobile Bottom Sticky Add-To-Cart Button


If we add a sticky "Add to Cart" button, then conversions will increase because users can easily add items to their cart without scrolling.
What We Changed
- Added a sticky "Add to Cart" button on mobile product pages.
- Ensured the button was visible regardless of scroll position.
The Results
We dig through every data source to map what's actually broken. By the end, there's no confusion.
Add-to-cart rate change
Add-to-cart rate change
visitors
Key Learnings
- Increased add-to-cart rate shows users appreciated quick access to purchase options.
- Decline in conversion rate and revenue suggests potential issues with order completion.
- Reduced average order value and revenue per visitor indicate possible distraction or misalignment with user intent.
- Slight increase in bounce rate may reflect user frustration or navigation challenges.
Detailed results breakdown
Add-to-cart rate change
+6.8%
Average order value
-15.5%
Click-through rate change
-0.4%
Lift in conversion rate
-7.7%
Change in revenue per visitor
-22.1%
Start with 3 experiments.
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30,000+ Monthly sessions.
Minimum traffic needed to run statistically significant tests.
Running on Shopify or Shopify Plus.
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Investing in paid traffic.
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Other experiments we've run

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-5.0% Conversion rate

Search & Navigation
Enhanced search results with clickable categories increase user engagement and conversions
We revamped the search feature to boost product relevance and category discovery. Discover how these changes drove significant improvements in key metrics.
+1.2% Clickthrough rate

Cart
Mini-cart redesign with highlighted checkout button boosts conversions and revenue
The minicart was redesigned to improve completion rates by making the checkout button harder to miss. Read the full details of this experiment.
+46.6% Revenue per visitor (RPV)