21 Product Ranking Factors in Amazon’s A9 Algorithm

Amazon’s e-commerce platform is more than just a marketplace. It’s a battlefield where brands vie for visibility and dominance. To win, you must master the science and art of Amazon product ranking. High rankings lead to greater visibility, which ultimately drives more sales. How, you may ask, can your brand climb the ranks? The secret lies in understanding Amazon’s A9 algorithm.

Unveiling the Mystery of Amazon’s A9 Algorithm

Amazon’s A9 algorithm may sound like something from a Sci-Fi movie, but it’s simply the method Amazon uses to rank products. Unlike Google’s more general search algorithm, A9 is designed with one primary goal – to maximize revenue per customer.

The workings of the A9 algorithm can be likened to a two-step dance. First, it sifts through its vast catalog to fetch relevant results, and then it ranks these results based on relevancy. Amazon continuously fine-tunes this algorithm by taking into account various factors like human judgments, programmatic analysis, and performance metrics.

Deciphering the Core Pillars of the A9 Algorithm

Amazon’s A9 algorithm stands on three equally sturdy pillars:

Conversion Rate – This involves factors like reviews, image quality, and pricing, which have been proven to influence conversion rates. Competitive pricing is critical for maintaining a robust Amazon conversion rate.

Relevancy – It’s important to show the algorithm that your product is relevant to a particular search query to rank higher.

Customer Satisfaction and Retention – Factors like Amazon seller feedback and order defect rate (ODR) play significant roles here. Ensuring your customers are satisfied and coming back for more boosts your chances of winning sales.

An In-Depth Look into Amazon Product Ranking Factors

The A9 algorithm considers several factors spanning conversion, relevance, and customer satisfaction. Let’s dive deeper into each of these components.

Conversion Rate Factors

1. Sales Rank – Known as the Amazon Best Sellers Rank, the more you sell, the higher your ranking, and vice versa.

2. Customer Reviews – The quality and quantity of product reviews are critical ranking influencers.

3. Answered Questions – This feature allows customers to get quick answers to their queries, boosting conversions.

4. Image Size and Quality – High-quality, large images (minimum 1,000 x 1,000 pixels) can enable the zoom feature, enhancing the customer experience.

5. Price – Pricing not only affects your Buy Box factors but also impacts your conversion rates and sales.

6. Parent-Child Products – This feature allows customers to see different variations of a product on one page, helping to boost reviews.

7. Time on Page and Bounce Rate – The longer a customer stays on your listing, the more it signals their interest to Amazon.

8. Product Listing Completeness – A fully completed product listing increases your chances of ranking higher.

Relevancy Factors

9. Title – An optimized product title should be keyword-rich, easily readable, and under 200 characters.

10. Features/Bullet Points – Detailed bullet points featuring keywords can significantly boost conversions.

11. Product Description – An engaging, keyword-rich description can increase customer engagement and conversion rates.

12. Brand and Manufacturer Part Number – Including the brand in your title aids customers searching by brand name.

13. Specifications – Listing the technical and physical details of your product, such as size, shipping weight, color, etc., shows Amazon your diligence.

14. Category and Sub-Category – Selecting the most relevant category for your product during listing setup is crucial.

15. Search Terms – Amazon allows five fields to specify the search terms associated with your product. Use these wisely, following Amazon’s best practices for keywords.

Customer Satisfaction and Retention Factors

16. Negative Seller Feedback – All negative feedback impacts your product search results and your Buy Box chances equally.

17. Order Processing Speed – Efficient, fast, and accurate shipping can improve your ranking.

18. In-Stock Rate – Consistently having popular products in stock can boost your ranking.

19. Perfect Order Percentage (POP) – Sellers with a higher percentage of perfect orders rank higher than those with order issues.

20. Order Defect Rate (ODR) – If a customer makes a claim against an order, it’s considered a defect. Defects can harm your ranking.

21. Exit Rate – The percentage of times a customer views your listing and then leaves Amazon. Products with lower exit rates rank higher.


Amazon product ranking is both a science and an art. To climb to the top, you must optimize your product listings, providing relevant, complete, and accurate information to increase your product’s visibility and boost sales. Remember, every small improvement can give you an edge over your competitors. So, get started today, and watch your brand soar!


Hi there, I’m Jason, your go-to-guide for Amazon brand management.

Ready to grow your Amazon business with expert help, troubleshooting and tips?

Join my list for exclusive tips and troubleshooting to help you go from $100k to 1M or from $1M to $10M. When you join, you’ll also get my ebook.

Subscription Form : Posts