If you have never run Amazon Ads before, the platform can feel overwhelming. This guide strips everything back to the fundamentals — what the ads actually are, how the auction works, how to set up your first campaign without wasting money, and what to expect in the first 30 days.
| 12-minute read | Beginner |
Amazon Ads is one of the most effective marketing channels available to self-published authors — and one of the most misunderstood. The premise is simple: you pay for your book to appear prominently when shoppers search for books like yours. But the details underneath that simple premise — how bids work, how keywords relate to search terms, how attribution is measured, what metrics actually matter — are not obvious from the interface alone. This guide explains everything a first-time KDP advertiser needs to know before spending a penny, and walks you through your first campaign launch with concrete, practical guidance.
What Amazon Ads Actually Are
Amazon Ads are paid placements on Amazon’s search results pages and product detail pages. When a shopper types “cozy mystery series” into the Amazon search bar, the results page shows a mix of organic listings (ranked by Amazon’s algorithm based on relevance, sales history, and reviews) and sponsored listings (books whose authors or publishers are paying to appear prominently for that search). Sponsored listings are marked with a small “Sponsored” label but are otherwise indistinguishable in appearance from organic results.
You pay for Amazon Ads on a cost-per-click (CPC) basis. This means you are charged only when a shopper actually clicks on your ad and visits your product page — not for every time your ad appears (impressions are free). You set a maximum bid: the most you are willing to pay for a single click from a specific keyword or placement. Amazon runs an auction among all advertisers targeting that keyword and awards the placement to the highest bidder, typically charging the winner only slightly above the second-highest bid (a second-price auction mechanism).
The critical thing to understand at the outset is that Amazon Ads do not generate sales automatically — they generate page views. Whether those page views convert into sales depends on your book’s listing: the cover, the title, the blurb, the price, and the social proof from reviews. Ads bring readers to your door; your listing either closes the sale or sends them away. This is why optimising your listing before spending on ads is always the first step.
How the Auction Works: What You Are Really Paying For
Every time a shopper performs a search or views a product page on Amazon, an auction takes place in milliseconds. Advertisers who have targeted that keyword or product submit their bids, Amazon evaluates the bids and various relevance signals, and the winner’s ad is shown. In a second-price auction, the winner pays the second-highest bid plus a small increment — not their maximum bid. This means setting a high maximum bid does not necessarily mean paying that full amount; it means you have a higher chance of winning the auction.
Two factors determine who wins the auction: bid amount and relevance. Amazon is not purely a highest-bidder-wins platform. If your book is highly relevant to the keyword — Amazon’s algorithm considers your book’s title, description, keywords, and sales history in relation to the query — you may win placements even when your bid is not the absolute highest. This is why a well-optimised listing with a strong keyword strategy can be more cost-efficient than a poorly optimised listing bidding aggressively.
Placement also matters. Ads can appear in three positions: Top of Search (the first row of results — most visible, highest CTR, typically most competitive), Rest of Search (further down the results page — less visibility but sometimes lower cost), and Product Pages (on the detail pages of other books — shown to shoppers actively looking at competitor titles). Each placement has different conversion behaviour. Over time, checking the Placement Report in your advertising console will tell you which placement type works best for your specific book and category.
The Three Ad Types Available to KDP Authors
Amazon Ads for books consists of three distinct ad formats. All three are available to KDP authors, though with different eligibility requirements.
Sponsored Products are the most important ad type for KDP authors and the right place to start. They appear as individual book listings in search results and on product pages. They can be set up with automatic targeting (Amazon decides which searches to show your ad for) or manual targeting (you choose specific keywords or product ASINs to target). Sponsored Products are available to all KDP authors with at least one published book. They require no creative assets beyond your existing cover and listing — Amazon uses your existing book data automatically.
Sponsored Brands allow you to create a banner ad featuring your brand name (or author name), a custom headline, and a selection of your books. They appear at the very top of search results, above Sponsored Products. They require at least three published books and a registered Author Central profile. Sponsored Brands drive brand discovery and are most effective for authors with a series or multiple books in the same genre. As of early 2026, an AI-powered headline generator is available in the Sponsored Brands setup workflow, and an AI image generator creates custom background images for banners at no additional cost.
Sponsored Display ads retarget shoppers who have previously viewed your book or similar books — showing your ad on Amazon, on the Kindle device home screen, and across Amazon’s wider display network including third-party websites. Sponsored Display requires no keyword selection; Amazon handles audience targeting automatically. It is particularly useful for keeping your book visible to interested readers who visited your listing but did not purchase immediately.
As a first-time advertiser, begin with Sponsored Products. They are the most straightforward to set up, generate the most useful data for optimisation, and provide the clearest link between ad spend and book sales.
What to Do Before You Create Your First Campaign
The most important pre-launch step is to evaluate your listing honestly. Ask yourself: does your cover look professional and genre-appropriate at thumbnail size? Would a stranger browsing Amazon immediately understand what kind of book this is? Is your blurb compelling, clearly written, and free of errors? Are there at least a handful of genuine reviews? Is your price appropriate for the category?
If you are uncertain about your blurb quality or listing copy, address that before spending on advertising. A poorly written blurb creates a conversion bottleneck — every click you pay for bounces off without buying. Professional proofreading before publication ensures both your book interior and your listing copy reflect the quality standard readers expect. The Vappingo manuscript proofreading service provides exactly this level of quality assurance for authors preparing to publish on KDP.
Next, research keywords before building your first campaign. Keywords are the terms readers type when searching for books like yours. Research them by: browsing the autocomplete suggestions in Amazon’s search bar for genre-relevant queries; looking at the keywords used in titles and descriptions of bestselling comparable books in your category; and using a dedicated tool like KDP Rank Fuel’s Keyword Goldminer, which surfaces high-traffic, relevant keyword opportunities with difficulty data that helps you prioritise. Having a prepared keyword list means your first campaign is targeted from day one rather than relying entirely on Amazon’s automatic suggestions.
Finally, set a clear test budget and timeframe. Decide in advance how much you are willing to spend to gather meaningful data — a realistic minimum is £100–£150 or $120–$180 over 30 days. This is not money spent on sales — it is money spent on information. Your first 30 days of advertising are a learning exercise, not a profitability exercise. Set this expectation clearly before you begin and you will not panic when early ACoS looks unflattering.
Setting Up Your First Campaign, Step By Step
Log in to your KDP account and navigate to the Marketing section in the left sidebar. Select “Amazon Ads” and you will be taken to the advertising console. From there, click “Create Campaign” and select “Sponsored Products”.
On the campaign settings screen: give your campaign a clear name (example: “YourBookTitle-SP-Auto”). Set the daily budget at £5–£10 or $6–$12 — enough to gather data without excessive spend. Leave the start date as today and remove any end date for an evergreen campaign. Select the bidding strategy “Dynamic bids — down only” — this is the safest option for a first campaign. Leave the campaign in “Enabled” status.
On the ad group screen: name the ad group clearly (example: “Auto-AllTargets”). Select your book from the product selector. For your first campaign, choose “Automatic targeting” — this lets Amazon match your ad to relevant searches based on your listing’s content, without requiring you to specify keywords upfront. Set a default bid at or slightly above the midpoint of the suggested bid range Amazon shows you — this ensures you win enough impressions to gather data without dramatically overspending.
Review and launch. Your first ad will be reviewed by Amazon (usually within a few hours) and then go live. Within 24–48 hours you should begin seeing impressions, and within the first week you should have enough initial data to understand which search terms are triggering your ad.
After your automatic campaign has run for 2–3 weeks, create a second campaign: a Sponsored Products manual keyword campaign. Populate it with the best-performing search terms from your automatic campaign’s Search Terms Report (more on this below) as exact match keywords. This is the harvest-and-scale process that drives long-term improvement.
Understanding the Key Metrics
Impressions: the number of times your ad was displayed to shoppers. High impressions with low clicks suggests a relevance or creative mismatch — readers are seeing your ad but not clicking. This may indicate a cover or title that does not clearly communicate the book’s appeal, or that the keyword targeting is slightly off-genre.
CTR (Click-Through Rate): clicks divided by impressions, expressed as a percentage. Average CTR for book ads is typically 0.3–0.6%. Below 0.2% suggests the ad is appearing for the wrong audience or the cover is not attracting attention at thumbnail size. Above 1% is excellent and suggests strong relevance between your targeting and your cover appeal.
CPC (Cost Per Click): the average amount you paid per click. This varies by category and keyword competitiveness. Book categories tend to have lower CPCs than most Amazon product categories — typically £0.15–£0.65 in the UK and $0.20–$0.80 in the US for most genre fiction and nonfiction. Higher CPCs are normal for competitive, high-traffic keywords.
ACoS (Advertising Cost of Sale): your ad spend divided by your ad-attributed sales, expressed as a percentage. ACoS = Spend ÷ Sales × 100. This is the primary profitability metric. To know whether your ACoS is good or bad, you must calculate your breakeven ACoS: royalty ÷ list price × 100. If your ebook earns £2.09 on a £2.99 price, breakeven ACoS is approximately 70% — any ACoS below this is profitable. Many new advertisers target unnecessarily low ACoS targets (such as 30%) without realising their actual breakeven is much higher.
ROAS (Return on Ad Spend): the inverse of ACoS — ad revenue divided by ad spend. An ACoS of 50% equals a ROAS of 2 (you earned £2 for every £1 spent). Amazon Ads reports show both, but ACoS is typically more intuitive for book advertisers because it maps directly to the breakeven calculation above.
What to Expect in the First 30 Days
Week one is typically characterised by low data volume: a handful of clicks, possibly zero or one sale, and ACoS numbers that look alarming. This is normal. Your automatic campaign is in its learning phase — Amazon’s algorithm is calibrating which searches and audiences convert best for your book. Resist the urge to make drastic changes in week one. Let the campaign accumulate data.
By week two, you should have enough click data to run the Search Terms Report meaningfully. Review it and begin adding negatives — irrelevant search terms that are consuming clicks without matching your book. Do not yet make major bid changes unless a specific keyword is generating many clicks and zero sales with a clearly irrelevant search term (in which case, add it as a negative).
Week three and four bring more meaningful data. At this point, review keyword-level performance: are any keywords consistently converting at good ACoS? Are any consistently burning budget without a single conversion? Start promoting converters to your exact match campaign and pausing clear non-performers (only if they have 15+ clicks without a single conversion).
At 30 days, do a full review. Calculate your overall ACoS for the month against your breakeven. Evaluate your total spend vs total attributed sales. Check organic rank for your primary keywords — has it moved since you started advertising? Many authors see a measurable organic rank improvement by day 30, even on a modest budget, which is the first evidence that ads are generating the sales velocity Amazon’s algorithm uses to determine organic placement.
Your First Optimisation: The Search Terms Report
The Search Terms Report is the single most important ongoing action in Amazon Ads management. It shows you the actual search queries that triggered your ad — the real words readers typed — and how each one performed. This is your window into reader behaviour and the foundation of all keyword refinement.
To run it: in the advertising console, go to Reports → Create Report → Sponsored Products → Search Term. Set the date range to the previous 14 days. Download the CSV. Open it in a spreadsheet. Sort by “Spend” descending. Add a calculated ACoS column (Spend ÷ Sales × 100). Then go through every row with 3 or more clicks and categorise it: converter (generated sales at acceptable ACoS — add to manual exact match campaign at a competitive bid); waste (multiple clicks, clearly irrelevant to your book — add as a negative keyword); or undecided (some clicks but no sale yet — leave for another week of data).
This process, done weekly for 15–20 minutes, is where most long-term Amazon Ads improvement comes from. It progressively eliminates wasted spend, surfaces genuinely converting search terms, and builds a manual campaign populated with real, empirically validated buyer queries. New advertisers who establish this habit in their first month tend to see meaningful ACoS improvement by month three. Use KDP Rank Fuel to supplement your keyword research and identify additional terms worth testing.
Common Questions From New Advertisers
How long before I see results? Meaningful data emerges after 2–4 weeks. Meaningful profitability trends are visible at 60–90 days. Amazon Ads are not an immediate-return channel — they reward consistent management over time. Treat month one as a paid education in your book’s market and reader vocabulary.
How much should I spend to start? A budget of £100–£150 or $120–$180 over 30 days, spread across 1–2 campaigns, is sufficient to gather genuinely useful data without catastrophic downside risk. More budget means faster data accumulation — but if budget is a concern, start lower and extend the evaluation period to 60 days.
What if my ACoS looks terrible in week one? This is extremely common and usually not cause for alarm. First-week ACoS is based on thin, early data and often improves significantly as the campaign learns. Only evaluate ACoS trends after 30 days and 50+ clicks. Early high ACoS with clear data-gathering conditions (low click volume, new campaign) is expected, not evidence of failure.
Should I run ads on a new release with zero reviews? It depends. Ads will generate impressions and clicks regardless of review count — but conversion rates are lower without reviews. A practical approach: run a modest auto campaign at low budget to build initial sales velocity (which can help get early reviews), while simultaneously pursuing ARC readers or early review requests. Once you have 10+ reviews, increase ad spend. The combination of ads and early social proof is more effective than either alone.
Can I run ads in multiple countries? Yes. Amazon Ads runs on separate marketplace platforms: amazon.co.uk, amazon.com, amazon.de, amazon.fr, and others. Each marketplace requires its own campaign setup and billing. Authors with international distribution often run separate campaigns per marketplace with country-appropriate bids and keywords. Start with your home market, establish an efficient process, and then expand internationally once you have a working template.
