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Amazon’s A9 Algorithm Explained: What Really Matters for Rankings in 2025

Poor Amazon product ranking can silently kill your sales – while your competitors pocket the thousands you’re losing daily.

  • March 13, 2025
  • /
  • Chuck Kessler
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Amazon’s marketplace becomes more competitive every single day, with over 9.7 million sellers globally battling for customer attention. Behind the scenes, Amazon’s powerful A9 algorithm silently determines which products appear in search results and which remain hidden in the digital abyss. 

What many sellers don’t realize is that most Amazon shoppers rarely look beyond the first page of search results, making algorithm optimization the single most important factor in marketplace success.

For Canopy Management partners, understanding these ranking factors has translated to an average 84% year-over-year profit growth. While most sellers struggle with constantly changing algorithm requirements, Amazon’s top sellers are leveraging these kinds of expert insights to maintain their competitive edge.

This comprehensive guide breaks down exactly what matters for Amazon rankings in 2025, how the algorithm has evolved, and the specific actions you can take today to improve your visibility and sales. 

Amazon Algorithm Evolution: Key Changes from 2024 to 2025

Between 2024 and 2025, Amazon’s A9 algorithm has undergone significant refinements, incorporating advanced AI technologies and placing greater emphasis on customer experience. 

According to expert Amazon analysts, these are the key developments:

1. Advanced AI Integration

2. Contextual Search Improvements

3. External Traffic and Seller Performance Metrics

4. Enhanced Customer-Centric Approach

Amazon’s algorithm evolution from 2024 to 2025 represents a continued shift toward more intelligent, customer-focused search experiences that prioritize relevance, meaningful engagement, and demonstrated seller excellence rather than easily manipulated metrics.

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Algorithm Fact vs. Fiction: What Actually Drives Amazon Rankings in 2025

The Amazon A9 algorithm weighs multiple factors when determining search rankings, but not all elements carry equal weight. Understanding which factors truly matter allows you to focus your optimization efforts where they’ll have the greatest impact.

Pro tip: Focus on your conversion rate first. Amazon’s algorithm prioritizes listings that convert browsers to buyers because this directly impacts Amazon’s revenue. 

Ready to Start Growing Your Amazon Brand?

Canopy’s Partners Achieve an Average 84% Profit Increase!

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Sales Velocity: The Hidden Ranking Multiplier

What should happen: Your sales momentum should create a positive feedback loop where increased sales lead to better visibility, which generates more sales.

What usually happens: Most sellers face the “visibility paradox” – they can’t increase sales without better rankings, but can’t improve rankings without more sales.

Pro tip: The first 30 days after listing a new product are critical. Amazon gives new listings a temporary ranking boost to gather performance data. Maximize this window with aggressive but targeted advertising to establish strong initial velocity signals.

Conversion Rate Optimization: Amazon’s North Star Metric

Amazon’s business model fundamentally relies on maximizing transactions. The algorithm heavily favors listings that efficiently convert searches into sales, making conversion rate optimization increasingly critical for rankings in 2025.

Pro tip: Focus on optimizing your main image. Testing shows that the main product image significantly impacts conversion rates more than almost any other listing element. Canopy’s listing optimization process tests multiple variants to identify the highest-converting option for your specific product and audience.

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Keyword Strategy: Beyond Basic Search Terms

The foundation of Amazon SEO remains relevant keyword implementation, but the algorithm has grown more sophisticated in understanding search intent and contextual relevance.

Pro tip: Amazon now weighs keyword relevance based on placement. Terms in your title carry more weight than those in your description. Prioritize your most valuable keywords in the first 80 characters of your title.

Review Strategy: Quality Over Quantity

The total number of reviews will always matter. Still, Amazon’s algorithm increasingly prioritizes review quality, recency, product attributes mentioned in feedback, and the following: 

Pro tip: Customer reviews that mention specific use cases improve your ranking for long-tail searches related to those applications. Encourage customers to share how they use your product through post-purchase follow-up.

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Backend Optimization: The Technical Edge

Behind-the-scenes technical optimizations can provide a significant ranking advantage, as most sellers neglect these less visible elements.

Pro tip: Amazon’s algorithm treats numbers differently than text. Include both numeric and text versions of specifications (e.g., “5 inches” and “five inches”) to capture different search patterns.

Advertising Integration: The Ranking Accelerator

Amazon’s A9 algorithm increasingly blends organic and paid ranking factors, creating a symbiotic relationship between advertising performance and organic visibility.

Here’s how:

Pro tip: Canopy’s proprietary C.A.T. (Canopy Advertising Technology) system identifies keywords where improving your paid ranking will have the greatest impact on organic position. Some keywords function as “ranking catalysts” that boost visibility across multiple related terms.

Inventory Performance: The Often Overlooked Ranking Factor

Amazon penalizes listings with inconsistent inventory availability, especially for high-demand products. Maintaining optimal inventory levels directly impacts your search visibility.

Pro tip: Amazon rewards sellers who maintain at least 30 days of inventory coverage based on current sales velocity. Dropping below this threshold can trigger ranking penalties even before you’re technically out of stock.

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Why Most Amazon SEO Solutions Fall Short

The majority of Amazon optimization services focus on surface-level tactics without addressing the algorithm’s complex interrelationships. Generic approaches fail to recognize that each product category has unique ranking factors and competitive dynamics.

Many service providers still operate on outdated assumptions about Amazon’s algorithm. In 2025, the A9 system has evolved to prioritize customer experience signals over basic keyword matching

Services that simply stuff keywords into listings without addressing conversion fundamentals ultimately harm your rankings.

Another critical shortcoming is the lack of data-driven methodology. Without proprietary analytics tools, most agencies make optimization decisions based on guesswork rather than statistically significant patterns. 

Canopy Management’s approach differs through our C.A.T. system, which analyzes vast datasets across Amazon’s ecosystem to identify specific optimization opportunities for your unique product portfolio.

Finally, most solutions treat Amazon SEO as a one-time project rather than an ongoing process. The algorithm updates constantly, with major changes occurring approximately every 45 days. Static optimizations quickly lose effectiveness without continuous refinement based on performance data.

Evaluation Framework: Is Your Amazon SEO Strategy Working?

Ask yourself these five questions to evaluate the effectiveness of your current approach:

  1. Has your conversion rate increased in the past 60 days? If not, your listing optimization may be missing key elements that drive purchase decisions.
  2. Are you ranking on page one for at least 80% of your target keywords? Lower visibility indicates fundamental issues with your SEO strategy.
  3. Do your advertising campaigns improve both paid AND organic rankings? Effective campaigns should create a halo effect that boosts overall visibility.
  4. Is your sales velocity consistent throughout the week, or do you see significant drops on certain days? Inconsistent performance suggests gaps in your optimization approach.
  5. Has your profit margin increased alongside your sales growth? True optimization improves profitability, not just revenue, by attracting higher-quality customers.

If you answered “no” to two or more of these questions, your current Amazon SEO strategy likely needs significant refinement to compete effectively in 2025.

Canopy Management’s Approach: Human Expertise Amplified by Technology

At Canopy Management, we’ve developed a comprehensive approach to Amazon SEO that combines advanced technology with expert human analysis. Our partners experience an average 84% year-over-year profit growth through our integrated methodology.

Our proprietary C.A.T. system analyzes millions of data points across Amazon’s marketplace to identify specific optimization opportunities unique to your product category and competitive landscape. Unlike generic SEO services, our approach is continuously refined based on real-time performance data from the $3.21 billion in revenue we manage for our partners.

What truly sets Canopy apart is our “human led, software driven” philosophy. While technology provides valuable insights, our team of Amazon experts applies contextual judgment and strategic thinking that algorithms alone cannot replicate. This combination has resulted in our recognition as America’s Fastest Growing Brand Management Agency by INC.com.

Our approach has proven particularly effective for established brands looking to scale their Amazon presence. With a 99.1% partner retention rate, our results speak for themselves.

Ready to Start Growing Your Amazon Brand?

Canopy’s Partners Achieve an Average 84% Profit Increase!

Find out more

Next Steps: Maximizing Your Amazon Ranking Potential

Ready to transform your Amazon presence with rankings that drive sustainable growth? Here are three specific actions to take today:

  1. Conduct a comprehensive listing audit using the evaluation framework above to identify specific weaknesses in your current optimization strategy.
  2. Prioritize your conversion rate optimization efforts on your top 20% of products that drive 80% of revenue, focusing first on image quality, title optimization, and bullet point refinement.
  3. Schedule a strategy session with Canopy Management’s Amazon experts to develop a customized roadmap for improving your rankings and profitability.

The Amazon marketplace becomes more competitive daily, with thousands of new sellers entering each month. The gap between page one listings and everything else continues to widen. Don’t let algorithm changes undermine your business growth.

Canopy Management is the full-service marketing agency for serious Amazon, Walmart, and TikTok sellers who recognize that expertise makes the difference between surviving and thriving in today’s complex marketplace ecosystem. 

Let us show you what’s possible when human expertise meets cutting-edge technology.

Ready to Start Growing Your Amazon Brand?

Canopy’s Partners Achieve an Average 84% Profit Increase!

Find out more