Case Study: a global accessories brand cuts ACOS by 40% across 13 markets with Quartile

Global Accessories Brand cuts ACOS by 40% across 13 markets with Quartile

A global accessories brand faced the challenge of scaling its Amazon advertising efficiently across 13 international markets. With a complex catalog of nearly 1,000 products, the brand struggled with inconsistent performance and an inability to maintain its target Advertising Cost of Sale (ACOS). The vendor, Quartile, was engaged to implement a localized Amazon Ads strategy that balanced global scale with market-level precision.

Quartile's solution involved a market-by-market optimization, pausing underperforming products and keywords to reduce wasted spend before scaling bids on top performers. This "trimming the fat" approach, managed regionally even during peak seasons, delivered significant results. The strategy led to a 40% improvement in ACOS in the US year-over-year, achieved ACOS reductions across all 13 countries, and drove stronger sales growth, as reported by Quartile.