An Amazon marketing agency is usually hired to run ads. That is the smallest part of the job. Sponsored Products spend is the visible line item, but the account underneath decides whether that spend converts: whether you control your own listings, whether the Buy Box is yours, whether the catalog is clean enough for Amazon's systems to understand what you sell, and whether inventory is in place when the campaign works. We run Amazon accounts alongside the brand's own storefront and paid channels, and this article lays out what a real engagement should cover, what to demand, and how the agency should report.
The Account Comes Before the Ads.
Ad performance on Amazon is a function of the listing. A campaign sending traffic to a product with weak images, a title that does not match the search, no A+ content, and a price that has lost the Buy Box will show a poor advertising cost of sale no matter how the bids are managed. Agencies that start with campaigns and skip the account are optimizing the wrong layer. The first weeks of an engagement should be an audit of Brand Registry status, catalog integrity, listing quality, pricing and Buy Box share, review health, and inventory position. Ads come after the foundation holds.
Brand Registry and Catalog Control.
Brand Registry is the mechanism that lets a brand claim authority over its own product detail pages, and it gates most of what matters: A+ content, the Brand Store, Sponsored Brands, brand analytics, and the tools for reporting counterfeit and unauthorized listings. If your trademark is not registered, or the registration is held by a distributor, fixing that is the first task. An agency should know how to file, how to handle a contested claim, and how to get contributions from third-party sellers overridden when they corrupt your listings.
Catalog control follows. Duplicate ASINs, broken variation families, wrong browse nodes, missing attributes, and legacy listings created by resellers all fragment your sales history and confuse the ranking systems. Cleaning this up is unglamorous case-by-case work with Seller Support and it is not optional. A clean catalog with correct parent and child relationships concentrates reviews and sales velocity onto the pages you want to rank.
Listings, A+ Content, and the Brand Store.
Listing work has two audiences: the shopper and Amazon's search. The title, bullets, and backend search terms carry the indexing. The images, A+ modules, and video carry the conversion. An agency should write titles from actual search term data, not from what the product manager calls the item, and should structure the image stack for mobile, where most browsing happens. A+ content should answer the comparison the shopper is making, and Premium A+ where the account qualifies expands what the page can do.
The Brand Store is the closest thing to your own site inside Amazon. It should be built with real navigation by use case or product line, refreshed on a schedule, and used as the landing destination for Sponsored Brands and for external traffic you send in from Meta or Google. A store visit lets you read attribution and keeps the shopper inside your catalog instead of dropping them into a search result full of competitors.
Buy Box, Pricing Policy, and Channel Conflict.
You cannot usefully advertise a product you do not hold the Buy Box on. You can run the campaign, and you will pay to send shoppers to a competitor's offer on your own listing. Buy Box share is the most overlooked driver of Amazon ad efficiency. Losing it comes from unauthorized sellers undercutting your price, from your own price being out of line with what Amazon sees elsewhere on the web, or from fulfillment and account health problems.
A good agency will set a pricing policy with you: a minimum advertised price if you sell through distribution, a map of who is authorized to sell on Amazon, a process for identifying and removing unauthorized offers, and a rule for how your Amazon price relates to your own storefront price. The last point is where Amazon and direct-to-consumer strategy collide, and the agency should be able to reason about both rather than only defending the marketplace. Our e-commerce and Amazon practice runs the storefront and the marketplace together for exactly this reason.
Sponsored Products and the Rest of the Ad Stack.
Amazon's ad system has grown well beyond Sponsored Products, and each format has a job. The agency should be able to explain what each campaign type is for in your account, not simply run all of them because they exist.
| Format | Primary job | What to watch |
|---|---|---|
| Sponsored Products, automatic | Search term discovery and catch-all coverage | Harvest converting terms into manual campaigns on a schedule |
| Sponsored Products, manual | Precise targeting of proven keywords and competitor ASINs | Match type structure, bid rules by placement, negative keyword hygiene |
| Sponsored Brands | Category ownership and Brand Store traffic | Creative quality, landing page choice, new-to-brand share |
| Sponsored Display | Retargeting and competitor detail page placement | Frequency, audience overlap, cost relative to search formats |
| Amazon DSP | Off-Amazon reach and audience building | Minimum spend, incremental reach, whether the account has the volume to justify it |
Structure matters more than bid tweaking. Campaigns should be organized so that spend can be read by product line and by intent, search term harvesting should run on a schedule, and branded and non-branded terms should be separated so that you can see what you are paying to acquire versus what you are paying to defend. Total advertising cost of sale, which measures ad spend against total account revenue rather than only ad-attributed revenue, is the number that keeps the ad program honest.
Reviews, Vine, and Launch Sequencing.
New products on Amazon face a cold start: no reviews, no sales history, no ranking. Vine is the compliant way to seed early reviews on enrolled ASINs, and a launch plan should include it along with a controlled early ad budget, a coupon or promotion to lift conversion while the review count is low, and a plan to shift budget toward proven terms as data accumulates. The agency should also handle review monitoring, flag policy-violating reviews on your listings and on competitor listings, and keep you inside Amazon's rules on review solicitation. Incentivized review schemes still get accounts suspended, and an agency that suggests one should be disqualified on the spot.
Inventory and Forecasting.
An ad campaign that runs a product out of stock destroys the sales history the ranking depends on and hands the position to a competitor. The agency does not own your supply chain, but it must run advertising in coordination with it. That means visibility into inbound shipments and days of cover, campaign rules that throttle spend as stock falls, and a plan for storage limits and restock windows around peak season. If your agency has never asked about inventory, it is treating Amazon as a media buy rather than a retail operation.
- Days of cover by ASIN reviewed weekly alongside ad spend.
- Spend rules that reduce bids or pause campaigns before a stockout, not after.
- Restock planning tied to Amazon's capacity limits and lead times, not to last year's calendar.
- Fulfillment mix, whether FBA, merchant fulfilled, or both, chosen by product economics and Buy Box behavior.
How an Amazon Marketing Agency Should Report.
Most Amazon agency reports lead with advertising cost of sale and return on ad spend, because those numbers usually look good. They are also the easiest to make look good, by leaning on branded terms and retargeting, both of which capture shoppers who were already buying. The report you want leads with the account: total sales, total advertising cost of sale, organic versus paid share, Buy Box share, new-to-brand orders, review velocity, and inventory position, with advertising metrics inside that frame.
“If the report only shows ad-attributed sales, you are seeing the part of the account the agency wants you to see. Total account contribution is the number that pays the bills.”
The same standard applies to the relationship between Amazon and your other channels. Amazon Attribution tags on external campaigns, brand analytics for search share, and a monthly read on whether marketplace growth is coming at the expense of your own storefront all belong in the report. We connect Amazon reporting to the same GA4 and paid media view we use for the storefront so that the business sees one picture, and our paid media team reads Amazon alongside Google Ads and Meta rather than in isolation.
What to Demand Before You Sign.
An Amazon marketing agency worth hiring runs the account as a retail operation with an advertising layer, not the other way around. If your current partner has never mentioned Buy Box share or inventory, that tells you what they think the job is. To see how we handle Amazon alongside the rest of the business, look at our e-commerce industry work or get in touch.
Do we need Brand Registry before hiring an Amazon agency?
No, but you need a registered trademark or an application in progress, and getting Brand Registry done should be the agency's first task. Without it you cannot use A+ content, the Brand Store, or most brand protection tools.
What is a reasonable advertising cost of sale on Amazon?
It depends on your margin, your category, and whether the product is launching or established. The better question is total advertising cost of sale against the whole account, judged against the contribution margin you need. Any agency quoting a universal benchmark is guessing.
Should we sell on Amazon if we already have a strong direct-to-consumer store?
Usually yes, because shoppers search there whether or not you list, and unauthorized sellers will fill the gap if you do not. The condition is a pricing policy and a channel plan so the marketplace does not undercut your own storefront.
How should an Amazon agency charge?
Prefer a flat fee for a defined scope, possibly with a component tied to total account growth. A percentage of ad spend rewards the agency for spending more, which is not the same thing as growing the account.