Amazon PPC Incrementality Test for Branded Keywords

Branded campaigns often show strong ROAS because the shopper was already looking for you. Attributed sales can look great while total sales would barely move without the spend.

An incrementality test compares total sales with and without the spend, rather than watching credit move between campaigns. Spillmark's Growth plan lists branded Amazon PPC tests alongside unlimited Meta holdout tests, with every design locked before it starts.

A branded campaign can post a low ACoS because the shopper already typed your name. The test does not move credit from one campaign to another. It compares total Amazon sales when you bid on the brand name with sales when you do not. You still approve the change.

1. Upload your reports, or connect. Start with the Seller Central, Amazon Ads, Meta and Shopify reports you already download, or connect with read-only access.
2. See profit by channel. Agents show sales minus Amazon fees, product costs and ad spend, with the math behind every number.
3. Plan a holdout you approve. Spillmark checks your order history to see whether a geo holdout can answer at your size. If it can, agents plan a test that pauses Meta in a few US states for 4 to 12 weeks and compares Amazon orders by ship-to state. Nothing pauses without your approval, and each test design is locked before it starts.

• Dashboard (free): report imports, profit by channel, and a pre-test check.
• Starter ($49/mo): for brands doing $0–$50k a month on Amazon. One holdout test at a time, locked experiment ledger, alerts.
• Growth ($199/mo): for brands doing $50k+ a month. Unlimited holdout tests, branded Amazon PPC tests, scored predictions.

Paid plans start with a 7-day trial for $0. Cancel anytime. Check current prices on spillmark.com.