15 CRO Mistakes I See in Almost Every Ecom Store
We've run 4,000+ A/B tests across 250+ brands. The same mistakes show up everywhere, even in stores doing €50M+/year. The 5 I see most often:
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"Loved by thousands" converts nobody.
"4.9 stars from 12,400 buyers" does.
Customers know when the sale "ends tonight" every week. It kills trust faster than it creates urgency.
Most brands test whatever sounded exciting in the last meeting.
For example score by traffic × likelihood × effort.
+12% on day 4 is often +0% by day 21.
Peeking is how you get expensive false positives.
There's no finished store. Every day you wait is revenue you don't get back.
All 15 are in the carousel below, with visual examples.
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