Adding a live '2,341 sold this month' counter to a product page raised add-to-cart 12.4% on a tested SKU.

Adding a live '2,341 sold this month' counter to a product page raised add-to-cart 12.4% on a tested SKU.
Quantified social proof converts a private decision into a validated crowd behavior.
— No count ▮▮▮▮ vs dynamic count ▮▮▮▮▮ on add-to-cart rate.
— Caveat: low numbers backfire — '12 sold' signals dead product; only show it past a credible floor.
Proof needs a denominator too. Read the number, not the story. [n≈11k sessions · 95%]