Prepare a purchasable offer
Check listing details, availability, total price and conditions. Advertising does not fix contradictory descriptions or unavailable stock. Identify products that can support paid acquisition before spreading a budget across the entire catalogue.
Define the metrics
Separate spend, attributed sales and contribution. Check report definitions and the attribution window for the format used. Do not directly compare reports with different criteria without recording the limitations. Preserve product-level detail when costs differ substantially.
Calculate contribution
Include product cost, selling fees, fulfilment and expected returns. ROAS is not margin. A seemingly high return on ad spend can remain insufficient when variable costs consume most of the revenue.
Test with boundaries
Set a spending ceiling, period and decision criterion. Monitor price and availability changes during the test. For small volumes, keep uncertainty visible rather than extrapolating the result to every product or claiming incremental demand.
- Check offer
- Define metrics
- Calculate contribution
- Bound the test
Worked example
Hypothetical example: €500 attributed sales from €100 advertising gives ROAS 5. With €350 variable costs, €50 remains before other expenses. This does not establish that all attributed sales were incremental.
Check before moving on
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Sources & method
Sources reviewed on 1 October 2026. Worked calculations use explicitly hypothetical inputs.
Topic provenance: Quels sont les avantages de la publicité sur Amazon ? - search-engine-feng-shui.com (consulted capture: 2022-07-03). Search Engine Feng Shui. This record does not confirm an individual byline.
This guide is newly written in 2026. It does not reproduce the earlier text and is not attributed to its historical author.