How Does the Amazon A10 Algorithm Work? Ranking Factors Explained
How Does the Amazon A10 Algorithm Work? Ranking Factors Explained
Amazon's A10 algorithm replaced the A9 system in 2023–2024 and fundamentally changed how products rank. Unlike the A9 (which was primarily keyword-matching focused), A10 weights sales performance and customer satisfaction far more heavily than keyword density. This guide breaks down the five core ranking factors, shows you which ones you can actually influence, and debunks the recycled A9 lore still circulating on YouTube.
TL;DR
| Ranking Factor | Weight | Can You Control It? | Quick Win |
|---|---|---|---|
| Relevance | 25% | Partially | Optimize your title and backend keywords for true matches only |
| Sales Velocity | 30% | Yes (with effort) | Run PPC, promotions, or deal platforms to bootstrap momentum |
| Conversion Rate | 25% | Yes (directly) | Test images, pricing, and bullet points with A/B splits via Listing A/B tests |
| Click-Through Rate (CTR) | 12% | Yes | Improve thumbnail image and title to stand out in search results |
| External Traffic & Reviews | 8% | Yes | Build off-Amazon traffic via content marketing and encourage verified reviews |
What is the Amazon A10 algorithm?
Amazon's A10 algorithm is a machine-learning ranking system that predicts which products customers will buy (and keep) rather than just which products match keywords. Launched in 2023–2024, it prioritizes products with high conversion rates, strong sales velocity, and low return rates over those with heavy keyword stuffing. A10 treats Amazon like a demand-prediction engine, not a search engine—if a product converts well, it ranks, regardless of how many times you mention the keyword in the description.
Why did Amazon replace A9 with A10?
Amazon abandoned A9 because it was exploitable. Sellers could rank by cramming keywords into titles and backend fields, even if their product didn't deserve to rank. A10 shifts the burden: prove customers want to buy your product, and Amazon will promote it. This move aligned Amazon's incentives with customer satisfaction—higher conversion and retention rates reduce returns and friction, which costs Amazon money.
The real change: A9 rewarded keyword relevance; A10 rewards sales and satisfaction.
What are the five core Amazon A10 ranking factors?
What is relevance in the A10 algorithm?
Relevance is whether your product actually matches the search query. Amazon scans your title, backend keywords, bullet points, and description for semantic matches (meaning-based, not just exact words). Unlike A9, A10 doesn't reward keyword repetition—it flags over-optimization as spam.
What you control:
- Use your primary keyword 1–2 times in the title (naturally, not forced).
- Add related keywords to the "Search Terms" field (backend keywords), but don't pad it.
- Match the search intent: if someone searches "women's running shoes," don't list hiking boots.
What you don't:
- You can't engineer relevance if your product category is wrong. A10 checks ASIN-to-category alignment.
Action: Audit your title and backend keywords against your top 50 search terms. If your product doesn't naturally fit, ranking will stall no matter what.
What is sales velocity in the Amazon A10 algorithm?
Sales velocity is the speed at which your product sells relative to competing products. A10 measures this daily: if your ASIN sells 10 units a day while competitors sell 2, Amazon promotes you.
Sales velocity is the single biggest ranking lever post-launch. A new product with zero reviews can rank Page 1 if it sells fast enough; a mature product with 10,000 reviews can drop to Page 3 if sales stall.
What you control:
- Run Amazon PPC (Sponsored Products) to drive sales spikes and signal demand to A10.
- Launch a lightning deal or 10-20% promotion to accelerate velocity in the first 30 days.
- Use deal platforms (CamelCamelCamel, Jungle Scout, etc.) to attract early buyers.
- Optimize your conversion rate (see below)—faster conversion = higher velocity on the same traffic.
What you don't:
- You can't fake velocity. Returns and refunds count against you; a 50% return rate tanks ranking.
- Buying fake reviews or using bots doesn't move A10 rankings anymore (A9 was vulnerable; A10 isn't).
Action: If you're launching a new product, budget 30% of your launch margin for PPC to hit 10+ sales/day in week one. This signals demand to A10 and compounds with organic visibility.
How does conversion rate affect Amazon A10 rankings?
Conversion rate—the percentage of visitors who buy—is the second-largest ranking factor. If 10% of browsers buy your product while competitors convert at 2%, A10 deprioritizes competitors.
This is where product images, pricing, and copywriting matter. A10 doesn't care if your title is perfect; it cares that people who click your listing buy.
What you control:
- Images: Test 5-7 images. First image must show the product clearly; avoid lifestyle photos (test them). A/B test via Amazon's Listing A/B feature or hire someone on Upwork to run splits.
- Price: Price elasticity matters. If you drop price 10%, do sales jump 20%? If so, A10 ranks you higher at the lower price. Test 2–3 price points in a 30-day window.
- Bullets and description: Use benefit-driven copy, not feature lists. "Prevents wrinkles in 2 weeks" converts better than "contains retinol."
- Reviews: Products with 4.5+ star averages convert 25–35% better than 3.5-star products. Encourage verified purchases to leave reviews.
What you don't:
- You can't game reviews. Fake 5-star reviews hurt conversion rate (customers spot them) and get your listing review-bombed by competitors.
Action: Run an A/B test on your main product image vs. a competitor's top image. If theirs converts better, copy the style, not the image. Adjust your bullets to emphasize the benefit that moves your customer demo (e.g., "no mess" for busy parents, "premium feel" for luxury buyers).
What is click-through rate in the Amazon A10 algorithm?
Click-through rate (CTR) is the percentage of shoppers who click your listing after seeing it in search results. If 5% of searchers click you and 2% click competitors, A10 ranks you higher.
CTR is driven by your thumbnail image and title in the search results snapshot—not your full page. A10 wants to promote products customers want to click on.
What you control:
- Thumbnail image: Should be your product alone, well-lit, filling 70–80% of the frame. Test white backgrounds vs. lifestyle. Solid backgrounds (blue, gray) often outperform busy photos.
- Title: Keyword placement matters less than scannability. "Stainless Steel Water Bottle, 32 oz, Keeps Drinks Cold 24 Hours, Leak-Proof, FDA Approved" is better than "Water Bottle Stainless Steel Cold 32 oz Bottle Hydration."
- Pricing display: Showing a discount in search (if applicable) can boost CTR by 8–15%.
What you don't:
- You can't control how many people search for your category (search volume is what it is).
Action: Screenshot 20 search results from your top keyword. Count how many of your competitors' thumbnails are cluttered or low-contrast. Simplify yours if it's in the bottom half.
What is external traffic in the Amazon A10 algorithm?
External traffic—visitors who land on your Amazon listing from outside Amazon (blogs, YouTube, social media, your own website)—signals to A10 that your product is in-demand beyond Amazon's ecosystem.
A10 gives a small ranking boost (8% of the algorithm) to products with external traffic because it indicates brand trust and demand that Amazon didn't generate internally.
What you control:
- Content marketing: Write blog posts like Amazon Conversion Rate Benchmarks that link to your product. Every backlink to your ASIN counts as external traffic.
- YouTube unboxings: Partner with micro-influencers (10k–100k subs) to do 60-second unboxings. Each link-click counts.
- Your own website: If you own a Shopify store or landing page, link to your Amazon listing. This builds a feedback loop: your brand's audience proves demand.
- Reddit and Q&A: Answer product questions on r/BuyItForLife or Quora and link your ASIN. Organic links are weighted more heavily than paid ads.
What you don't:
- You can't buy backlinks and expect A10 to count them. Low-quality link farms are ignored.
- Paid advertising (Facebook ads, Google ads) pointing to Amazon help CTR and sales, but they're not "external traffic" in A10's algorithm unless the traffic is genuinely brand-interested (cold traffic counts less).
Action: Identify 3 high-authority blogs in your category and pitch a guest post that includes your ASIN link. If you sell fitness supplements, reach out to fitness blogs; if you sell kitchen gadgets, reach out to food bloggers.
Common A10 myths debunked
Myth: "Keyword density matters; stuff your title with keywords." Truth: A10 penalizes keyword stuffing. Amazon's ML model detects unnatural language. "Coffee Maker Coffee Machine Coffee Brewer" will rank lower than "Programmable Coffee Maker with Thermal Carafe."
Myth: "Backend keywords are 90% of ranking." Truth: Backend keywords set relevance, but relevance is only 25% of A10. Sales velocity and conversion rate matter 55% together. Optimize backend keywords (don't stuff), then focus on PPC and images.
Myth: "More reviews = automatic ranking boost." Truth: More reviews help conversion rate if they're 4.5+ stars. A product with 5,000 3-star reviews ranks lower than one with 200 4.8-star reviews.
Myth: "You need to run deals constantly." Truth: Deals boost velocity temporarily. A one-time 15% promo in week 1 accelerates ranking faster than ongoing 5% deals. After you rank, deals burn margin.
How to optimize your Amazon listing for A10 (step-by-step)
Audit relevance (Week 1): Run your ASIN through a tool like Helium 10 or Jungle Scout. Check if your backend keywords match your top 50 search terms. Remove irrelevant keywords.
Set up A/B testing (Week 2): Use Amazon's Listing A/B feature to test your main image vs. a competitor's top image, or test two title variations. Run for 2 weeks minimum.
Launch or scale PPC (Week 2–3): If you have <50 sales/month, run a $10/day PPC campaign targeting your top 10 keywords. Target a -30% ACoS initially (aggressive, but necessary to signal demand).
Encourage reviews (Ongoing): Post-purchase, send follow-up emails asking for reviews. Offer a small incentive (not money; maybe a discount on the next purchase). Aim for 1 review per 15–20 purchases.
Build external traffic (Week 3+): Write a blog post about your product category (e.g., "Amazon Listing Optimization Guide") and link to your ASIN. Submit to Hacker News or relevant subreddits if it's genuine value.
How ListingTonic helps you win with A10
Diagnosing why your product isn't ranking is hard. A10 ranking issues could stem from poor image quality, weak copy, low conversion rate, or weak relevance signals—all of which look identical from the seller dashboard.
ListingTonic audits your Amazon listing against A10 ranking factors and identifies the highest-ROI fix. Our AI highlights whether you're losing to competitors on images, title quality, or pricing—and rewrites your listing to match top-ranking competitors in your category.
If you're stuck on Page 2 or 3, an audit takes 5 minutes and often finds a 20–40% conversion lift just from image or bullet-point changes.
Related reading: If you're also optimizing your PPC budget, check out our guide to controlling spend on demand-side platforms.
Disclaimer
This article is for informational purposes only and does not constitute business, legal, or financial advice. Amazon's algorithm, ranking factors, and policy are proprietary and subject to change. The ranking factors and weights described here are based on publicly available industry research and seller experience as of June 2026. Verify all claims with official Amazon Seller Central documentation before implementing changes. Your mileage may vary based on category, seasonality, and competition. Always monitor your metrics (sales, CTR, conversion rate) to measure the impact of listing changes.
Last updated: June 28, 2026