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Writer's pictureSaurabh Debnath

Cracking the Amazon's A10 Algorithm Code



In the world of ecommerce, few things are more important yet more elusive than understanding how Amazon determines the ranking of products on its marketplace.


For sellers seeking visibility and sales, decoding Amazon's search algorithm is akin to finding the holy grail.


Amazon's original proprietary algorithm for ranking listings was A9, launched in 2003. Over the years, it evolved into an extremely complex and secretive system leveraging AI, machine learning, and billions of data points to curate the customer experience.


Then in 2019, Amazon unveiled its next generation A10 algorithm, marking a new paradigm for product discoverability.


So how exactly does this state-of-the-art algorithm work, and what can sellers do to optimize their listings today?


Here we will unravel the inner workings of Amazon's algorithm evolution, demystify the key factors that impact search ranking, and provide actionable strategies to help your products ascend to page one. Let's get started!



The Evolution of Amazon's A9 to A10 Algorithm

To understand where we are today with A10, it's instructive to understand its origins. Amazon's first-generation search algorithm, A9, was launched in 2003. Designed by Amazon's in-house search team Lab126, it leveraged principles of information retrieval to connect customers with relevant products.


Initially, A9 weighted factors like keywords, sales history, click-through-rate, conversion rate and seller performance to determine rankings. It operated similarly to early Google algorithms, rewarding keyword optimization and consistency across listing details.


Over time, Amazon added more facets like customer reviews, browse nodes, brand authority and competitive pricing. Advertising also became a core element, allowing sponsored products to jump to the top of search pages. The increasing complexity made it near impossible to reverse engineer A9's logic.


By 2019, the limitations of A9 were apparent. With over 12 million products on Amazon, customers were overwhelmed with choices. Relevance had declined as sellers crammed keywords without context. The rapid shift toward mobile also challenged A9's PC-first approach.


It was time for a reboot. With A10, Amazon sought to provide true customer-centric discovery, leveraging AI/ML and natural language processing. Rather than keywords, the focus became understanding search intent through all available signals.





So what exactly changed with the transition from A9 to A10? Let's explore the key contrasts:


Key Differences Between the A9 and A10 Algorithms


Focus on customer experience: A10 represents a paradigm shift towards satisfying the customer's search intent, moving away from keyword optimization as the primary ranking factor. Dr. Xiao Pan, Amazon's Principal Search Scientist, summarized it as "humankind over keyword-kind."


Relevancy scoring: While A9 used keywords density as a proxy for relevance, A10 employs AI and NLP to deeply analyze listings and assign unique relevancy scores based on all available data signals, internal and external.


External signals: A9 focused almost entirely on internal data like sales history, page visits, etc. A10 also analyzes external signals including customer reviews, forum mentions, web searches and social media engagement.


Mobile optimization: With mobile shopping exceeding desktop on Amazon, A10 was optimized for the smaller screen real estate and quicker customer decision journey on mobile apps.


Personalization: A10 incorporates individual customer data and context to tailor results, moving beyond the "one-size-fits-all" approach of A9. Factors like past searches, purchases and demographics personalize results.


Customer engagement: A10 seeks not just to match keywords, but engage customers based on their search intent, providing a more intuitive discovery experience that drives satisfaction and conversion.


This evolution shows Amazon's laser focus on using technology to remove friction and createmoments of customer delight. For sellers, it means optimizing beyond keywords into a customer-centric mindset across the entire shopping journey.




Key Ranking Factors of Amazon's A10 Algorithm

Now that we've explored the high-level principles, let's get into the specifics of how A10 determines search rankings today. While the exact weighting and science remains opaque, these are widely accepted as core factors based on Amazon's patents and seller experiments:


Relevancy Score: The probability that a product meets the customer's search intent based on NLP evaluation of the title, bullets, descriptions and other content.


Historic Sales Volume: Demonstrated product demand based on units sold and revenue. Signifies both product-market fit and seller capability.


Conversion Rates: The percentage of site visitors that purchase the product indicates appeal and satisfaction.


Reviews: Quantity, recency and sentiment of customer reviews influence rankings based on correlations with conversion.


Click-Through-Rate: How often a listing is clicked when appearing in search results denotes attractiveness.


Competitive Pricing: Listings priced competitively compared to other sellers see a boost. Displays value.


Prime Eligible: Prime products with benefits like free shipping are favored, especially for mobile.


Sponsored Products: Sponsored products get preferential placement at the top of search pages.


Brand Reputation: Authority built over time including trademarks, registered brands and positive perception.


External Signals: Mentions of product names across the web including social media and forums indicate interest.


So in summary, A10 aims to deeply understand the holistic customer journey and perception of a product, not just keyword matching.



Next, we'll explore how sellers can lean into these factors.





Expert Strategies to Optimize for Amazon's A10 Algorithm


The evolution to A10 requires sellers to shift from a purely keyword-driven mindset to one that embraces the end-to-end customer experience. Here are tips from top experts on optimizing listings for A10 success:


Refine Keyword Targeting - While less singularly important, keywords still provide the foundation. Ensure keywords appear in titles and backend meta-data. Master long-tail variations.


Elicit Positive Reviews - Prompt satisfied customers to leave reviews through product inserts and emails. Maintain 5-star average ratings. Respond helpfully to negative reviews.


Boost Sales Velocity - Run promotions and discounts to increase units sold. Consider giveaways and influencer partnerships to stimulate demand.


Raise Conversion Rates - Provide comprehensive product details, appealing visuals and competitive pricing. Make it easy and compelling for customers to click "Buy Now".


Build Brand Reputation - Earn badges for brand registry, trademarks and transparency. Foster positive seller rating through support. Surface your brand story.


Monitor CTR - Keep improving listing quality with great titles, bullets, images and video to drive clicks from search.


Advertise Strategically - Use Amazon advertising to gain visibility for new products or target keywords with high commercial intent.


Optimize for Mobile - Ensure listings are concise, imagery crisp and pages fast-loading on mobile. Enable mobile-friendly content.


Enhance Personalization - Provide expanded variations with unique product IDs to match individual customer needs like size.


Leverage External Signals - Encourage user-generated content on social media and reviews referring to your brand and products.


The key is taking a 360-degree view of how customers interact with your brand across the entire journey - from product research to post-purchase. By optimizing each touchpoint, you enable A10 to fully capture positive signals that boost rankings.




Launch Strategies to Ace Amazon's A10 Algorithm

A new product launch lays the foundation for your listings' performance. Making the right moves out the gates can help you start strong and accelerate velocity on A10. Here are tips from Amazon launch expert Ryan Neeley:


Perform Competitor Analysis - Identify the top 10-20 currently ranking listings for your planned keywords. Study what's working for product positioning and marketing.


Optimize Early Ad Targeting - Develop a targeted advertising campaign focused on your most relevant keywords and categories to gain initial visibility.


Incentivize Initial Reviews - Promote your launch in external channels and provide discounts to early reviewers to quickly garner external signals.


Forecast Demand - Work backwards from your unit sales goals to determine pricing, inventory needs and production volume required to meet demand.


Prime Eligible Shipping - Ensure your shipping methods meet Prime eligibility standards for fast, free shipping to delight those coveted customers.


Monitor Closely - Keep a pulse on your sales velocity, reviews and conversion rates to optimize on the fly during the crucial launch period. React swiftly to any dips.


Get these fundamentals right at launch, and you have a strong foundation for A10 performance long-term. Remember, early momentum is key to fuelling ongoing sales growth.




Mastering Amazon's Mobile Shopping Experience

One of the biggest shifts from A9 to A10 is the optimization for mobile shopping. Consider that over 70% of Amazon visits now originate on smartphones or tablets. Winning the mobile experience is mandatory.


Here are tips recommended by mobile commerce expert Olivia Wade for creating mobile-friendly Amazon listings:


Summarize Titles - Lead with your most essential keywords in a concise title of under 60 characters max.

Here is the continuation of the article on optimizing for Amazon's A10 algorithm:

Enhance Visuals - Optimize your most important product image for small screens. Ensure fast load times. Include zoom capabilities.

Simplify Layout - Remove clutter. Lead with the essential product details visible above the fold.

Leverage Dropdowns - Use dropdowns to house more detailed content without overwhelming small screens.

Highlight Reviews - Display key excerpts from positive reviews prominently near the top.

Enable One-Click Ordering - Make sure one-click checkout is enabled to facilitate impulse purchases.

Test Mobile Performance - Use Google PageSpeed, Pingdom Tools and Amazon's mobile simulator to diagnose issues.

Track Mobile Metrics - Monitor mobile conversation rate, bounce rate and other metrics to optimize accordingly.

Promote Mobile App - Encourage customers to purchase via the Amazon mobile app through discounts or exclusives.


By focusing on mobile speed, simplicity and convenience, you enable on-the-go customers to quickly find, evaluate and purchase your products through seamless mobile journeys.



The Rise of External Signals in A10 Algorithm

One of the biggest differences between A9 and A10 is the consideration of external signals outside Amazon itself, namely customer reviews and social media. This expands the data points for discerning true product quality and satisfaction.


User-generated reviews have become hugely influential for customers researching products. According to an Ignite Visibility study, 92% of shoppers read online reviews before making a purchase.


Positive sentiment and certain keywords within reviews can boost conversion.

Meanwhile, social media provides a valuable pulse on brand perception and even specific product performance. Mentions with high engagement levels signal interest and advocacy.


To leverage external signals with A10:

- Proactively solicit positive reviews through email and product inserts. Highlight key excerpts.

- Monitor reviews to quickly address negative feedback and request revisions if inaccurate.

- Engage fans on social media with compelling content and conversation.

- Promote user-generated social posts about your products through likes, shares and replies.

- Develop brand advocates and influencers who frequently mention your products.

- Avoid manipulative tactics like paid reviews, which can seriously backfire if discovered.


External validation earned through reviews and social media provides powerful trust and social proof that the A10 algorithm factors favorably into ranking and relevancy calculations.




The Personalization Potential of Amazon A10

With A10's increased ability to tailor results based on individual user data and context, the doors open to enhanced personalization. While Amazon keeps its personalization approach closely guarded, there are opportunities for sellers to take advantage.


For example, Amazon A10 can detect:

- Purchase history - To recommend complementary products from the same seller

- Browse history - To showcase previously viewed items

- Preferences - Like size, color or style selected in the past

- Demographics - General interests associated with age, gender, location

- Context - Such as gifting occasions based on time of year


Sellers can optimize their strategy by:

- Providing expanded variation options - Like different sizes, colors to match past selections

- Curating complementary bundles or accessories based on purchase history

- Using dynamic creative to showcase different images or offers tailored to the customer

- Retargeting previous site visitors with ads for abandoned cart products

- Optimizing listings for relevant gifting keywords around holidays

- Linking brand storefronts for easy discovery of related products


While Amazon keeps its personalization cards close, savvy sellers can still leverage these capabilities by fully understanding their customers and listing products in ways that facilitate tailored recommendations.



The Bottom Line on Amazon A10

In closing, here are the key lessons on optimizing for success within Amazon's evolving A10 system:


- Shift focus from keywords to satisfying customer search intent through relevance.

- Obsess over the end-to-end buyer journey from discovery to delight to advocacy.

- Leverage both internal and external signals of product quality, demand and satisfaction.

- Optimize for the exploding mobile shopping experience.

- Continuously test and iterate - remain agile to algorithm changes.

- Think beyond your own listings to the broader customer experience.


The brands that will win on Amazon are maniacally customer-focused. While A10 represents a new paradigm, the core principles of customer experience remain more important than ever.


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