GreenLeaf: Slashing Amazon ACoS by 29% While Doubling Sponsored Sales
How rigorous search query isolation, aggressive negative harvesting, and placement bid adjustments scaled ad profitability without cannibalizing organic rank.
The Starting Point
GreenLeaf sold high-purity organic herbal adaptogens. Their previous agency had dumped 120 keywords into broad-match auto campaigns and walked away. Advertising Cost of Sales (ACoS) had ballooned to 41.2%, wiping out profit margins.
The Bottleneck: Budget was constantly being consumed by irrelevant search queries (e.g., “dog supplements”, “cheap tea bags”) before midday, starving high-converting exact match keywords of ad impressions.
What We Engineered
- Aggressive Negative Keyword Pruning.Audited 90 days of search term reports and instantly added 420+ non-converting and irrelevant search terms as negative phrase/exact matches, immediately saving $2,400/month in wasted spend.
- Single-Theme Campaign Architecture.Segmented campaigns by target intent: Brand Defense, Competitor Conquesting, Category Exact, and Discovery Auto. Bids were strictly isolated so non-performers could never drag down winning terms.
- Placement Modifier Dayparting.Shifted bid modifiers to prioritize “Top of Search (First Page)” where conversion rate was 3x higher than “Rest of Search” and product pages.
- Sponsored Brand Video Retargeting.Launched clean, short-form benefit demonstration videos for shoppers who visited competitor listings without buying, recapturing intent at a 4.2x ROAS.
Before & After Campaign Performance
What Changed
Within 60 days of taking over ad operations, ACoS plummeted from 41.2% to 29.3%, while total monthly sales volume nearly doubled (+94%). By feeding Amazon’s algorithm with higher-converting clicks, organic sales velocity accelerated, reducing total ad dependency (TACoS).
“PhotoPixc cut our ad spend waste on day one. Our previous agency charged a percentage of spend, so they were happy letting our budget run wild. PhotoPixc actually cared about our bottom-line profit.”
What to Measure in Your Account
The daily metrics monitored in Amazon Advertising Console.
- Target ACoS vs Break-Even ACoS: Ensuring advertising remains profitable after COGS and Amazon fees.
- Total Advertising Cost of Sales (TACoS): Total ad spend divided by total sales (measuring organic lift).
- Search Term Impression Share: Dominance on core category keywords.
- Conversion Rate by Placement: Top of search vs rest of search vs product detail pages.
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