Advertising on Amazon: How Sponsored Ads and DSP Actually Work

What Advertising on Amazon Actually Means

Advertising on Amazon splits into two systems that work nothing alike. Sponsored ads are self-serve, keyword or product targeted, and billed per click — anyone with a seller or KDP account can switch one on in minutes. Amazon DSP is programmatic display and video, bought on a CPM basis, reaching audiences on Amazon.com, Fire TV, IMDb, Twitch and third-party sites whether or not you sell anything on Amazon at all.

The formats you'll actually run: Sponsored Products (search results and product pages, CPC, one ASIN at a time), Sponsored Brands (a banner above or beside search results featuring up to three products, CPC), Sponsored Brand Video (the same placement with a video creative instead of static images), Sponsored Display (retargeting and competitor-page placements, CPC or vCPM), and DSP (display, video and streaming TV, CPM, generally run as a managed service).

Authors advertising books on KDP use the exact same console as any other seller. There is no separate 'author ads' product — you're running Sponsored Products or Sponsored Brands against your book's ASIN, with the same bidding and targeting mechanics as a kitchen brand or a supplement company.

How a Campaign Actually Runs, With Real Numbers

Every sponsored campaign runs the same auction underneath: you set a bid, Amazon matches your ad against a shopper's search or browsing context, and you pay only when the ad is clicked. DSP works differently — you buy impressions at a CPM, so you pay whether anyone clicks or not, and the case for it rests on what those impressions do further down the funnel, not the click itself.

To make that concrete: across 30 of the advertisers we manage on DSP, the portfolio ran 78.4 million impressions in July 2026 at a $4.00 CPM, with a blended $1.42 cost-per-click once every placement type is counted. The $0.41 CPC that gets quoted around this category is real, but it's an online-video-only number — blend in display and audio and it moves a long way. That same book produced 57,137 attributed purchases at a blended $5.49 cost per acquisition, and 20.1% of those purchases came from shoppers new to the brand. Portfolio-wide return was 6.04x — measured across the whole book, not cherry-picked from the best line item.

None of that is a promise about what your account will do. It's what one large, mixed portfolio produced in a single month, and it's useful mainly as a sanity check: if someone quotes you a $0.41 CPC as typical for a DSP campaign, ask which placement that number actually came from.

Setting Up a Campaign, Step by Step

Getting a sponsored campaign live follows the same five steps regardless of format:

• Register as an advertiser through Seller Central, Vendor Central, or your KDP account.
• Pick an objective — visibility, conversion, or both — and set a daily or campaign budget.
• Choose targeting: automatic to let Amazon match your ad to relevant searches, or manual if you already know the keywords and categories worth bidding on.
• Add creative — product image and copy for Sponsored Products, a headline and up to three products for Sponsored Brands, a video file for Sponsored Brand Video.
• Set a starting bid and launch. There's no setup fee and no minimum spend required to start a sponsored campaign.

DSP works on a different track. Amazon's own advertising page states that a managed-service option with an Amazon Ads account executive normally requires a minimum investment of $50,000 — that's Amazon's own figure, not ours, and it's why most businesses start with sponsored ads and only look at DSP once spend and catalog size justify it.

Once live, the console reports clicks, spend, sales and Advertising Cost of Sales (ACoS) by campaign, keyword or product. Check it weekly for the first month — bids that look right on day one are often wrong by day ten once real auction data comes in.

When the Numbers Are Bad: What to Actually Check

If ACoS is too high, don't just cut the bid. Pull the search term report first — broad and automatic targeting often spends against searches that have little to do with the product, and negating those terms usually fixes more than a bid cut does. If impressions are healthy but clicks are low, the problem is usually the creative or the price, not the targeting. If clicks are healthy but sales aren't, that's a listing problem — images, reviews, price — not an advertising problem, and no bid adjustment will fix it.

The harder failure mode is attribution, not spend. Last-click reporting will tell you a DSP campaign 'isn't working' because a sponsored ad picked up the last click on a path DSP started. That's not evidence DSP added nothing — last-click can't measure incrementality, full stop. The only way to know is a holdout, running the same audience with and without the ad and comparing outcomes, or reconciling DSP and sponsored ads together in Amazon Marketing Cloud so the same purchase doesn't get counted twice.

The Mistake Most Advertisers Make (We've Made It Too)

The most common mistake — one we've made ourselves early in an account — is judging upper-funnel spend by the same last-click yardstick as a bottom-funnel keyword campaign, then cutting it because the dashboard ROAS looks worse than Sponsored Products. It almost always looks worse, because last-click hands the credit to whichever ad ran last, and that's usually the cheapest, most bottom-funnel one. The fix isn't to defend the number. It's to stop asking last-click to answer a question it was never built to answer, and measure the actual lift instead.

A second, more mundane mistake: leaving default automatic targeting running for months without reviewing the search term report. It's the fastest way to find out, three months late, that a chunk of the budget has been going to searches for a completely different product.

Where reMKTR Fits In This

reMKTR runs Amazon DSP as a managed service. We hold real DSP seats — 109 of them live right now — and we reconcile DSP against sponsored ads inside Amazon Marketing Cloud so the same sale doesn't get counted under both. That's the only honest way to say whether display actually added anything, because last-click can't prove it and never could. We're part of the Full Circle group, which has managed more than $500M in Amazon spend across 100+ brands. If you're running Sponsored Products on your own catalog, you probably don't need us yet — fix the search term report, fix the listing before the bid, and come back when DSP and incrementality are the actual question.