Two sellers bid on the same keyword. One pays $0.60 a click and sits at the top of the page, the other pays $1.20 and barely shows, and the difference comes down to relevance.
Amazon does not simply sell the top spot to the highest bidder. The platform weighs how relevant your ad is to the shopper’s search alongside your bid, so a tightly relevant ad can win better placement at a lower cost per click (CPC) than a loose one paying more.
I have spent years pulling CPCs down across 7 to 9 figure accounts, and relevance is almost always the lever. The guide below explains what relevancy means on Amazon, why it drives your CPC, and how to improve it.
TL;DR — the short version
Relevancy on Amazon is how closely your ad, keyword, and product match what a shopper searched for, and it is one of the main inputs Amazon uses to decide which ads win and what they pay. Amazon does not publish a single relevancy score, but a more relevant ad tends to earn better placement at a lower CPC, because Amazon rewards ads shoppers are likely to click and buy. You improve it by tightening your listing and keywords around real search intent, structuring campaigns cleanly, and building the conversion history that proves your product fits the query.
What Relevancy Means on Amazon Ads
Relevancy is Amazon’s read on how well your product answers a shopper’s search. When someone types a query, Amazon decides which ads to show by weighing several signals together, and relevance is central to that decision.
According to Amazon Ads, the platform chooses which Sponsored Products and Sponsored Brands ads to serve based on the keywords you bid on, the amount you bid, and shoppers’ expected interest in your offer, judged from the offer itself, similar offers, and past purchases. Relevance runs through all three. A keyword that fits your product, a listing that matches the query, and a history of shoppers buying after they click all tell Amazon your ad belongs in that auction.
One thing relevancy is not is a public score you can look up. Amazon does not hand you a number, so treat relevancy as a direction to move rather than a metric to check, improving the inputs Amazon can see.
How Relevancy Affects Your CPC
Relevance shows up in your CPC through the auction. Your final cost per click is based on your bid plus other factors and never exceeds your maximum bid, so the more relevant your ad, the more efficiently that bid works.
Amazon’s bidding strategies make the link direct. With dynamic bidding, Amazon lowers your bid on a less relevant search query and raises it where a shopper is likely to convert, so relevance decides whether you spend more or less on a given click. A high-relevance keyword can hold a strong placement at a bid a low-relevance competitor cannot match profitably.
The payoff compounds. Lower CPCs mean the same budget buys more clicks, and because those clicks are relevant they convert better, which lifts the conversion history that makes your ad even more relevant next time. Lowering CPC this way protects your ACoS far more durably than simply cutting bids.
Improve Relevancy in Your Product Listing
The listing is where relevancy starts, because Amazon reads it to understand what your product is. A listing that speaks the shopper’s language turns a keyword you bid on into an obvious match.
Work the places Amazon indexes for relevance:
- ●Title and bullets. Lead with the words shoppers actually search, drawn from your keyword research, so the query and your listing use the same language.
- ●Backend search terms. Fill them with relevant synonyms and long-tail variants you cannot fit in the visible copy, without repeating words already in the title.
- ●Main image and price. A clear main image and a competitive price lift click-through and conversion, and those results feed back into how relevant Amazon considers your ad.
- ●Category and attributes. Put the product in the right category and complete its attributes, since Amazon uses both to judge which searches you fit.
Amazon’s best-practice guidance is to advertise listings that are complete and competitive, because ads only convert as well as the page they send shoppers to.
Tighten Campaign Structure to Lift Relevancy
How you build campaigns tells Amazon how relevant each ad is. A term buried in a broad, everything campaign looks less relevant than the same term isolated in a tight ad group built around it.
Group keywords by theme and match type so each ad group points at one clear intent, and give proven terms their own exact match campaigns where the ad, keyword, and product line up perfectly. Prune the misfits with negatives, since every irrelevant search you block with negative keywords sharpens the relevance signal on what remains. A clean campaign structure is one of the simplest ways to raise relevance without spending a dollar more.
Build Relevancy With Sales and Conversion History
Relevance is about more than matching words; it is about proving shoppers buy. Amazon watches what happens after the click, so click-through rate (CTR), conversion rate (CVR), and sales velocity all feed its read on whether your ad deserves the impression.
A product that earns clicks and converts them teaches Amazon the ad is relevant, which lowers CPC and lifts placement over time. That is why a new listing often pays high CPCs at first and sees them fall as it builds history. Concentrate early spend on the keywords most likely to convert, win real sales through them, and let the momentum from that step-by-step PPC work compound into stronger relevance and cheaper clicks.
Avoid the Mistakes That Raise Your CPC
A few common habits quietly push relevance down and CPC up. Watch for these.
- ●Bidding on loose, high-volume keywords. Broad terms with weak intent pull irrelevant clicks that drag your relevance and your ACoS, so favor specific, high-intent terms.
- ●Sending relevant clicks to a weak listing. A poor main image or an uncompetitive price kills conversion, and Amazon reads the low conversion as low relevance.
- ●Ignoring your search term report. Wasteful queries you never negate keep telling Amazon your ad is a loose match, so review and prune on a schedule.
- ●Chasing placement with bids alone. Raising bids to force a top-of-search placement without fixing relevance just pays more for the same weak match.
- ●Skipping optimization. Relevance drifts as search behavior shifts, so fold it into your ongoing Amazon PPC optimization rather than setting campaigns once.
Frequently Asked Questions (FAQs)
Conclusion
Relevancy scores on Amazon are less a number to chase than a habit of matching your ad, keyword, product, and listing to what shoppers actually want. Get that match right and Amazon rewards you with better placement at a lower CPC, because you are showing shoppers products they are likely to buy.
Tighten your listing and keywords, structure campaigns cleanly, prune the misfits, and let conversion history do the rest, and your cost per click falls as your relevance climbs. If you want a team to find and fix the relevance gaps quietly inflating your CPCs, get a free Amazon PPC audit and we will show you where they are.
About the author: Isaac Gross is the founder and CEO of IG PPC, a hands-on Amazon and Walmart PPC agency for 7 to 9 figure brands. An Amazon seller since 2015, he founded IG PPC in 2019, and the firm now manages billions in annual Amazon sales.
