CommerceIQ: Prime Day 2026 ad spend drops 8.8% while conversion rate jumps 17.1%
By
Luis Rijo
Summary
CommerceIQ's first-look report on Amazon Prime Day 2026 reveals that while product page traffic fell 10.3% year-over-year and total ad spend dropped 8.8%, unit conversion jumped 17.1% and total ordered revenue declined only 1.7%. Brands maintained ROAS at 4.78x despite fewer shoppers, suggesting improved targeting efficiency and purchase intent among the smaller audience. The report raises questions about whether this advertising discipline can hold as cost-per-click (CPC) continues to rise.
Source
Key quotes
· 3 pulledShoppers who showed up for Amazon's Prime Day 2026 arrived in smaller numbers but converted at a sharply higher rate.
Total ordered revenue just 1.7 percent below Prime Day 2025, even though product page traffic fell 10.3 percent year over year.
Unit conversion, meanwhile, climbed 17.1 percent, and unit vol
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