Margin-based structuring organizes campaigns by product profitability rather than by category or brand. High-margin products get aggressive targets and budget; low-margin products get conservative ones. This lets bidding match each tier to what it can actually afford, instead of applying one blended target that overpays for thin-margin sales and underspends on profitable ones.
Open almost any e-commerce account and the campaign structure mirrors the catalog: campaigns by category, by brand, by product type. It’s tidy and intuitive — and it quietly sabotages profitability, because it forces wildly different products to share a single bidding target. A 70%-margin accessory and a 12%-margin appliance end up bid to the same ROAS, which means one is starved and the other is overspent. For more on query control, see our approach to negative keywords.
Margin-based structuring throws out the catalog logic and organizes the account around the only thing that determines what a product can afford to pay for a click: its margin.
Why category structure misallocates
A blended target applied across mixed margins is mathematically guaranteed to be wrong for almost every product in the group. It’s too aggressive for the thin-margin items and too timid for the fat-margin ones — the worst of both. To understand the underlying data infrastructure, review our guide on server-side tagging.
| By category | By margin | |
|---|---|---|
| Groups | Similar products | Similar margins |
| Target | One blended ROAS | Tier-specific |
| High-margin items | Underspent | Scaled |
| Low-margin items | Overspent | Protected |
How margin tiers work
You group products into margin bands — high, medium, low — and structure campaigns around those bands. Each tier gets a ROAS or CPA target derived from its actual profitability: aggressive where there’s margin to spend, conservative where there isn’t. Now the algorithm bids each product to what it can genuinely afford, and budget flows to where it earns the most profit.
What changes when you restructure
The shift is immediate and visible. High-margin products, freed from a too-cautious blended target, scale into the demand they were leaving on the table. Low-margin products, no longer flattered by averaging, get reined into profitability or deprioritized. The account’s total revenue might barely move — but its profit climbs, because every dollar is now bid against what it can actually return.
Budget shift after margin restructuring
Directional reallocation across margin tiers.
Isn’t this just more complexity to manage?
It’s more setup, yes — but it replaces constant manual fiddling with a structure that bids correctly by design. You do the margin work once, and the account stops misallocating on every click thereafter. The complexity is front-loaded; the profit compounds.
Structuring by category optimizes for tidiness. Structuring by margin optimizes for profit — and profit is the only thing the structure should be serving. It takes knowing your real numbers, which is exactly why most accounts never do it, and why doing it is an edge.
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