Category links on mobile collection pages got a new hierarchy and color highlights to stand out. The change hurt sales, and testing showed the cost.
Bolder Category Links on Collection Pages Cut Conversion Rate 20.1%


If we make category links more prominent on collection pages, then conversion rate will increase because shoppers will find the right products faster.
What We Changed
- Swapped the order of category titles and links.
- Added color highlights so each category stands out from the rest of the page.
The Results
How the new version compared with the original, across all devices.
Conversion rate
Revenue per visitor
Orders
Key Learnings
- Louder navigation didn't make shopping easier: conversion rate fell 20.1% and revenue per visitor 26.3%.
- The original had a 98.5% probability of performing better after 11 days.
- With 8,563 mobile visitors the result didn't reach full significance, but the drop was large.
- Testing showed the cost of a change that looked like an improvement.
Detailed results breakdown
Conversion rate
-20.1%
Revenue per visitor
-26.3%
Orders
-21.4%
Average order value
-7.8%
Start with 3 experiments.
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Who qualifies?
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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Our bet
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Other experiments we've run

Collection Page (PLP)
Inconclusive
Sale Percentage on Product Cards Makes No Clear Difference to Conversion Rate
Sale items showed their percentage price reduction inline on product cards. See what changed across 8,260 visitors in 19 days.
+1.0% Conversion rate

Homepage
Inconclusive
A Customer Content Carousel on the Homepage Shows Mixed Results on Conversion and Revenue
The homepage got a carousel of curated customer photos, videos and social posts. See how engagement and order value moved over 23 days.
+6.1% Conversion rate

Product Page (PDP)
Inconclusive
Advertising Free Socks With Shoe Purchases Makes No Clear Difference to Conversion Rate
Every shoe order already came with free socks, but few shoppers knew. The product page now said so next to add-to-cart, and the socks went into the cart automatically.
-0.6% Conversion rate
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