Is A10 an official Amazon algorithm name?

No. Amazon has not officially confirmed the name A10. It is a term used by the Amazon seller community to describe observed changes to Amazon's ranking behaviour. Amazon updates its algorithm continuously without publishing changelogs or naming specific versions. Treat A10 as a useful framework for understanding ranking signals rather than an official specification.

Does Amazon A10 penalise PPC advertising?

No. A10 does not penalise sellers for running PPC ads. The change is that PPC-driven sales are understood to carry less indirect weight in the organic ranking model than they did under A9. Running well-targeted PPC that generates high-conversion traffic still benefits organic ranking. The shift is away from high-spend, broad-match campaigns that produce sales without strong conversion signals.

How do I optimise for Amazon A10?

Focus on the same fundamentals that drove A9 performance: strong keyword relevance in your title and backend fields, a high listing conversion rate, competitive pricing and strong review scores. Layer in the A10 emphasis by maintaining excellent account health, using Fulfilled by Amazon where possible and considering external traffic sources such as social media or influencer partnerships that drive organic Amazon sales.

When did Amazon switch from A9 to A10?

Amazon does not announce algorithm updates publicly, so there is no confirmed date. Sellers began noticing ranking behaviour changes consistent with what they now call A10 from around 2019 onwards, with further changes observed through 2021 and 2022. The algorithm updates continuously, so A10 describes a direction of change rather than a single event.

Does seller authority affect every listing in my account?

Seller authority is an account-level signal, so it influences all listings under that account rather than individual listings in isolation. This means a strong account health history can benefit new listings you launch, and poor account health can limit the ranking potential of otherwise well-optimised listings.

What is Amazon A10?

Amazon A10 is a term used widely in the Amazon seller community to describe updates to Amazon's search ranking algorithm that moved beyond the original A9 model. The changes sellers attribute to A10 include greater weight on organic sales signals, seller authority and external traffic, and reduced reliance on ad-driven sales as a proxy for product quality. Amazon has not officially confirmed the A10 name. A10 is the name sellers use for the updated version of Amazon's product search algorithm. Amazon began rolling out changes to its ranking model that sellers observed as shifts in which signals drove organic ranking. The community named these changes A10 to distinguish them from the original A9 framework, though Amazon itself has not published an official update with that label. The changes attributed to A10 broadly reflect Amazon's apparent effort to surface listings that earn their ranking through genuine commercial merit rather than advertising spend alone. Organic sales, seller reputation and external traffic are all understood to carry more weight under the updated model. Under A9, ad-driven sales had significant indirect ranking influence because they fed directly into the sales velocity model Amazon used for organic ranking. Sellers who spent heavily on Sponsored Products could accelerate organic ranking by generating ad-assisted sales. Under A10, the relationship between ad spend and organic ranking is understood to be weaker. Organic sales velocity is now believed to carry more weight than it did under A9. A sale generated by a shopper who found the product through organic search and converted without clicking an ad is valued more highly in the ranking model than a sale generated via a Sponsored Products click. This incentivises genuine listing quality over advertising volume. Seller authority is a signal that appears to carry more weight under A10. Factors including account health, consistent fulfilment performance, catalogue breadth and return rate are understood to contribute to how Amazon assesses seller credibility alongside individual listing quality. Seller authority is a concept that refers to how Amazon assesses the overall health and credibility of a seller account, as distinct from any individual listing. Factors believed to contribute include account health score, order defect rate, late shipment rate, fulfilment method (Fulfilled by Amazon tends to outperform Fulfilled by Merchant for most rankings), catalogue size and the breadth of positive customer history across the account. This means that a new seller launching a well-optimised listing may rank below an established seller with similar listing quality, because the established seller brings a stronger authority signal to the ranking calculation. Building seller authority over time, through clean account health and consistent fulfilment performance, is part of the long-term SEO strategy under A10. The strategic shift A10 implies is towards earning ranking through listing quality and genuine buyer satisfaction rather than advertising volume. This means the optimisation fundamentals remain unchanged: strong keyword coverage in your title and backend fields, a high conversion rate and positive review performance all still drive ranking. External traffic is a signal that sellers are increasingly exploring under the A10 model. Driving shoppers from social media, email lists, creator partnerships or external websites to your Amazon listing and generating sales generates an external traffic signal Amazon appears to weight positively. Amazon Attribution makes it possible to track which external channels drive Amazon sales. PPC still matters for ranking indirectly, but the strategy shifts: rather than using ad spend to generate raw sales volume, the focus is on running well-targeted campaigns that produce high-conversion traffic. Efficient PPC that converts at a strong rate generates better organic signals per pound spent than broad, high-spend campaigns with poor conversion.

Amazon A10 is the updated version of Amazon's search algorithm. Learn how A10 differs from A9, what ranking signals changed and how to adapt your SEO.