Amazon A9 Algorithm: A deep dive into Ranking factors on Amazon


For any seller on Amazon, understanding the A9 algorithm is crucial for success. This complex algorithm dictates which products appear at the top of Amazon’s search results, significantly impacting your product’s visibility and sales.

But what exactly goes into the A9 algorithm?

In this blog post, we will discuss the key ranking factors that influence Amazon A9 Algorithm and your product’s organic position on Amazon.

What is Amazon A9 Alogorithm?

Amazon’s A9 algorithm is the powerful engine that drives the product search ranking system on Amazon. It determines which products appear at the top of search results based on various factors, including relevance, sales performance, and customer behavior. Essentially, the A9 algorithm aims to provide customers with the most relevant and high-quality products to enhance their shopping experience on Amazon.

To achieve optimal visibility and sales on Amazon, advertisers must understand and adapt to the nuances of the A9 algorithm. This involves implementing effective Amazon SEO strategies, such as keyword optimization, product listing enhancements, and maintaining positive customer feedback. By aligning with the principles of the A9 algorithm, sellers can improve their product rankings, attract more potential customers, and ultimately drive higher sales on the platform.

Factors Influencing the A9 Algorithm

1. Keyword Relevance:

Just like Google search, Amazon search engine also heavily relies on keywords. By including relevant keywords throughout your product listing, from titles and descriptions to features and backend keywords, you signal to the algorithm what your product is and who it’s for. However, keyword stuffing is not the answer. Amazon prioritizes organic use and relevance over keyword density.

2. Conversion Rate:

Unlike Google, which focuses on informational searches, Amazon is all about conversions – getting customers to buy. The A9 algorithm prioritizes products with a strong sales history and high conversion rates. You can check your “unit session percentage” metric in the Amazon business report to track the conversion rate of a product.

amazon a9 algorithm

3. Product Reviews and Ratings:

Positive reviews and high ratings are gold on Amazon. The A9 algorithm considers both the quantity and quality of reviews. Not only do good reviews build trust with potential buyers, but they also indicate customer satisfaction, a key factor for the algorithm. Encourage satisfied customers to leave reviews and address negative ones promptly.

4. Click-Through Rate (CTR):

The CTR, or the percentage of people who click on your product listing after seeing it in search results, is another crucial metric. A high CTR tells the A9 algorithm that your listing is grabbing attention and is relevant to user searches. Optimize your titles and main images to entice users to click and learn more.

5. Seller Performance:

Whenever customers search for a product on Amazon, Amazon aims to provide a positive customer experience. As a seller, your fulfillment speed, customer service response time, and order defect rate all contribute to your overall seller performance. A strong track record demonstrates reliability and can positively impact your product ranking.

6. Amazon Prime:

Products with Prime fulfillment often get a ranking boost, as Prime members are more likely to convert. Consider offering FBA (Fulfillment by Amazon) to gain this advantage.

7. Sales Velocity:

Sales velocity refers to the speed at which a product is selling on Amazon. The A9 algorithm considers strong sales history and sales velocity as a key performance indicator when determining rankings. Products with a high sales velocity are often favored by Amazon’s algorithm because they indicate popularity and relevance to customers, leading to improved visibility in search results.

8. Inventory Availability:

Inventory availability refers to the quantity of a product that is currently in stock and available for purchase on Amazon. The A9 algorithm takes into account inventory availability when determining product rankings in search results. Products with sufficient inventory levels are more likely to be prioritized by the algorithm as they can fulfill customer orders promptly. Maintaining adequate inventory levels helps ensure consistent visibility and sales performance on the platform, as products that are out of stock or have limited availability may experience lower rankings and missed Amazon sales opportunities.

How to Optimize for Amazon A9 Algorthim?

Optimize Product Titles:

The product title is crucial for the A9 algorithm as it serves as the primary identifier for search relevance. It should contain relevant customer’s search query and accurately describe the product to improve its visibility. A clear and concise title not only helps customers find the product they’re looking for but also enhances its ranking potential on Amazon.

Use High-Quality Product Images:

product images

High-quality images are essential for grabbing customers’ attention and conveying the features and benefits of the product. Images directly impact click-through rates and conversion rates, both of which are factors considered by the A9 algorithm. Optimized images that meet Amazon’s guidelines contribute to improved search visibility and overall performance on the platform.

Use Descriptive Bullet Points:

a+ content

Bullet points provide a concise summary of key product features, benefits, and specifications. Including relevant keywords in bullet points helps improve search relevance and visibility. Additionally, well-structured bullet points make it easier for customers to quickly understand the value proposition of the product, leading to higher engagement and conversion rates.

Use Compelling Product Descriptions and A+ Content:

amazon a9

The product description offers an opportunity to provide additional details and context about the product. Including relevant keywords and phrases in the description enhances search relevance and improves the likelihood of the product appearing in relevant searches. A compelling and informative product description not only satisfies customer queries but also positively impacts the product’s ranking on Amazon.

Offer Competitive Prices:

Price is one of the key factors influencing the Amazon A9 Algorithm, impacting rankings and visibility. Competitive pricing can positively affect a product’s performance, as lower-priced items may attract prospects and generate higher sales volumes.

The algorithm considers both the price of the product itself and any shipping costs when evaluating its competitiveness. Additionally, dynamic pricing strategies, such as offering discounts or promotions, can influence the algorithm’s perception of the product’s value and relevance to customers. Ensuring that prices are competitive and in line with market trends can help improve a product’s ranking and performance on Amazon.

Increase Reviews & Ratings:

Customer reviews and ratings are significant factors influencing purchase decisions and product visibility on Amazon. Products with higher ratings and positive reviews are more likely to rank higher and attract potential customers. Encouraging satisfied customers to leave reviews and promptly addressing any negative feedback can help improve overall ratings and enhance the product’s visibility on the platform.

Q&A Section:

amazon a9 algo

The Q&A section provides valuable insights into customer queries and concerns about the product. Addressing common questions and providing helpful responses not only improves customer satisfaction but also contributes to the product’s search relevance. The A9 algorithm may consider the activity and engagement in the Q&A section as a signal of product relevance and customer engagement, thus impacting its ranking on Amazon.

Backend Search Terms:

Backend search terms or backend keywords are hidden keywords that sellers can add to their product listings to improve search visibility. These terms are not visible to customers but are indexed by the A9 algorithm to determine the relevance of the product to specific search queries. Including relevant keywords can help enhance the product’s discoverability, drive more traffic, and increase its chances of appearing in relevant searches.

Run Amazon Sponsored Ads:

Creating campaign

While not a direct ranking factor, advertising on Amazon can significantly increase product visibility and drive sales. Increased sales can then lead to a higher organic ranking through the factors mentioned above.


In conclusion, understanding and leveraging the intricacies of Amazon’s A9 algorithm is essential for improving product visibility and maximizing organic sales on the platform. By optimizing product listings with the right keywords, compelling product descriptions, and high-quality images, you can enhance their Amazon ranking factors and attract more prospective customers.

Moreover, focusing on factors such as conversion rate and click-through rate allows you to align your strategies with Amazon’s search engine algorithms, ultimately driving more audience to your listings. By continuously monitoring and refining your approach to Amazon’s algorithms, sellers can stay ahead of the competition and capitalize on the vast potential of customer searches on the platform.

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