How the Amazon A10 Algorithm Works: Ranking Factors You Can Actually Influence (Ranked)

By Abdul Saboor, Founder of QREZYN · 2026-11-01

If you've typed "how Amazon A10 algorithm works" into Google, you're probably staring at a listing that isn't moving and wondering what Amazon actually wants from you. Here's the direct answer: A10 ranks products by blending relevance (does this listing match the search term) with performance (does this listing actually sell once shown), and it leans more heavily on performance than Amazon's older A9 algorithm did. In practice, that means sales velocity, conversion rate, and keyword relevance carry the most weight — while things like seller authority, external traffic, and even some PPC activity play a smaller but real supporting role.

The important shift from A9 to A10 is that Amazon now rewards listings that convert well organically, not just ones that run heavy ad spend to fake their way up. That's good news if you're a smaller seller: you don't need the biggest ad budget to rank, you need the most convincing listing and the fastest-selling product once a shopper lands on it. Below is the factor list in the order it's actually worth your attention — not the order most blog posts list it in.

What the A10 Algorithm Actually Optimizes For

Amazon's stated goal, repeated in seller forums and Amazon's own documentation, is to show shoppers the product most likely to get purchased and kept. A10 approximates that goal using measurable signals it can track at scale: historical sales, click-through rate, conversion rate, keyword match quality, and account-level trust signals like order defect rate. It doesn't "understand" your product — it pattern-matches behavior. That means every tactic below works because it changes a number Amazon's system is already watching, not because it tricks the algorithm.

1. Sales Velocity and Conversion Rate (Highest Impact)

This is the single biggest factor you can influence, and it's influenced by everything else on this list indirectly. A10 tracks how many units you sell relative to how many people viewed the listing (sessions) over a rolling window. A listing converting at 15% will out-rank a listing converting at 6% for the same keyword, even with fewer total sales, because Amazon reads the high conversion rate as "shoppers want this."

• What moves it: main image click-through, pricing competitiveness, review count and rating, Prime eligibility, and how well your bullet points answer objections before checkout.
• Where sellers go wrong: they chase more traffic (PPC, external ads) before fixing a listing that's leaking conversions. More traffic to a weak page just confirms to Amazon that the listing doesn't convert — which can actively hurt rank.

2. Keyword Relevance in Title, Bullets, and Backend

A10 can't rank you for a search term it doesn't associate with your listing. Relevance is built from your title, bullet points, description, and backend search terms, plus — increasingly — from actual purchase behavior tied to specific search queries (tracked in Search Query Performance data). If customers search "stainless steel French press" and buy your listing after that exact search, Amazon strengthens the link between your product and that phrase, independent of whether the word order appears verbatim in your title.

• What moves it: front-loading your highest-intent keyword in the title, covering synonyms and use cases across bullets, and using all available backend search term space without keyword stuffing.
• Where sellers go wrong: stuffing titles with every keyword variation, which actually dilutes relevance signals and hurts click-through because the title reads like spam.

3. Internal Sales History (Per Keyword)

A10 keeps keyword-specific sales history, not just overall sales history. This is why a listing can rank well for one search term and nowhere for a close variant — Amazon has only seen conversions tied to the first phrase. This is also why sudden keyword pushes (a single PPC blast) rarely produce lasting rank: Amazon wants sustained conversions tied to that term over time, not a one-week spike.

• What moves it: consistent, sustained sales against a specific keyword over weeks, not days — which is why ranking campaigns need a multi-week runway, not a one-time push.

4. PPC Activity (Indirect, Not Direct)

Amazon has been clear that running PPC does not directly boost organic rank. What it does is generate the sales and keyword-attributed conversions described above, which then do influence rank. Sponsored Products placement on page one also increases visibility, which increases organic impressions and, if your listing converts, organic sales. Treat PPC as a lever that accelerates factors 1 through 3 — not a shortcut that replaces them.

5. Account Health and Fulfillment Method

Order Defect Rate, late shipment rate, and valid tracking rate all feed into whether Amazon trusts your account enough to surface your listings prominently, particularly in competitive categories. FBA listings also tend to get a visibility edge over FBM because of Prime badge eligibility and faster, more predictable delivery — both of which improve conversion rate, which loops back to factor 1.

6. External Traffic and Brand Signals

This ranks lower because its effect is smaller for most sellers, but it's real: traffic from outside Amazon (social, email, Google ads landing on your listing) earns a small ranking boost, and Amazon has publicly incentivized this through programs like Brand Referral Bonus. It won't rescue a weak listing, but layered on top of a converting one, it compounds results.

What This Means for Your Priority List

If you only have time to fix one thing this month, fix conversion rate — main image, pricing, and review velocity — before touching anything else. Keyword work matters, but a perfectly keyword-optimized listing that converts at 4% will still lose to a mediocre listing converting at 12%. Sequence it: fix the conversion leaks, confirm relevance in title and backend terms, then use PPC and sustained sales to build keyword-specific history over several weeks. Account health and external traffic are maintenance items, not quick fixes.

When It's Worth Getting Expert Help

Understanding the ranking factors is one thing; diagnosing which one is actually holding your specific listing back is another. If you've made obvious fixes and still aren't moving — or you're not sure whether your real problem is relevance, conversion, or account health — that's usually the point where a second set of experienced eyes pays for itself. QREZYN offers a free Amazon audit that looks at your listing, keyword coverage, PPC structure, and account health together, so you're fixing the actual bottleneck instead of guessing. It's a fast way to find out exactly where A10 is penalizing you before you spend another dollar on ads or another hour rewriting copy that isn't the real problem.