Keyword relevance — what Amazon means and how to earn it.
Amazon's auction multiplies your bid by a relevance score before ranking. Relevance is decided by the listing, the historical click and conversion data, and the keyword's match to category. Three inputs you can actually move.
Relevance is the modifier Amazon applies to your bid before ranking it in the auction. A high-relevance ad with a 0.50 EUR bid can outrank a low-relevance ad with a 1.50 EUR bid for the same query. The model is opaque, but its inputs are not. Three things move relevance and they are the three things you can actually control.
1. Listing match to the keyword
Title, bullet points, description and backend search terms together form Amazon's understanding of what the listing is about. A keyword that appears literally in the title is judged maximally relevant; a keyword that appears nowhere in the indexable fields is judged minimally relevant. Backend search terms count, but less than the visible fields.
This is why the AMALYZE listing audits in the Listing product group are upstream of every PPC decision — if the listing does not contain the keyword, no bid will ever achieve efficient CPC on it.
2. Historical click and conversion data for the keyword
Once a keyword has been auctioned against your ASIN a few hundred times, Amazon's model has its own evidence of whether shoppers who saw your ad clicked and converted. Strong historical CTR and CVR on a keyword lift your relevance score for that exact keyword and for close variants of it. Weak history depresses it.
The implication: relevance is partly self-reinforcing. A keyword that converts will get cheaper to bid on; a keyword that does not will get more expensive. That is why pausing under-performing keywords is sometimes the wrong move — sometimes the right move is to fix the listing first.
3. Category match
Amazon's classification of which browse-node your ASIN sits in. A "running shoes" keyword on an ASIN in Sports → Footwear → Running is judged structurally more relevant than the same keyword on an ASIN miscategorised as Sports → Apparel. If your category placement is wrong, fix it before tuning bids; no amount of bid work will compensate.
What you cannot move
Amazon's relevance model is a black box. There is no published score, no diagnostic that says "your relevance for keyword X is 0.62". The proxies are: the suggested-bid range (a wide range with low mid-point on a relevant keyword suggests low relevance for your ASIN specifically), the realised CPC vs bid gap (wider gap = higher relevance), and the impression-share trend (rising = relevance improving).
The Module 2 connection
This episode is the bridge from the Module 2 customer-intent-meets-the-product-page chapter to the day-to-day bidding work. Relevance is the mathematical formalisation of intent matching. Bids that ignore relevance are bidding into thin air.
Watch Episode 16: Keyword relevance (German)
The German walkthrough — what keyword relevance is and how to improve it.
Improve relevance, lower the realised CPC.
AMALYZE shows you which keywords your listing actually ranks for organically — the strongest single signal of where your relevance score is high enough to bid efficiently.