What is Amazon SEO?

Amazon SEO means optimizing product listings (title, images, bullet points, description and backend search terms) to rank higher in Amazon's search results and recommendation modules. It follows its own logic; it isn't a simple copy of technical SEO built for Google.

The core difference lies in how each search system reaches content. Google crawls the web with a crawler that discovers and indexes pages openly, serving very different intents: informational, navigational or transactional. Amazon doesn't crawl the web; it indexes a closed product catalog with a single purpose, surfacing the items most likely to sell. That's why organic search, as understood on Google, doesn't map cleanly onto Amazon's internal search.

Selling on marketplaces counts as a branch of e-commerce with its own visibility rules, distinct from an independent online store. A brand can rank well on Google and still be invisible on Amazon if it ignores the factors specific to that search engine.

The table sums up the core difference: Amazon optimizes for sales inside a closed ecosystem, while Google evaluates pages across an open network. A link from an outside site can move a page up in Google, but it won't shift a single position inside Amazon's search results.

Amazon's search runs on a ranking system known as A9, a name inherited from A9.com, the search-technology subsidiary Amazon founded in 2003 and shut down in 2019 after criticism over favoring its own products in results. The system itself is still active: it reads keywords from the title, bullet points, description and backend search terms, and cross-references them with purchase-behavior signals. Since 2024, a component Amazon itself has documented, called COSMO, adds a layer of semantic understanding on top of that base, so raw keyword matching is no longer the only thing that counts.

The term "A10" has circulated since 2021 in forums and industry blogs to describe a supposed update that weighs external traffic and customer satisfaction more heavily. Amazon has never confirmed that name in any announcement, developer documentation or public patent filing. On Amazon's own Seller Central forums, Amazon staff have stated that the company doesn't publish official documentation about its search algorithms. This glossary treats "A10" for what it is: a label coined by the seller and agency community, useful for discussing observed changes, but without official backing.

Among the factors Amazon does acknowledge publicly are the listing's CTR in search results, conversion rate, sales history (reflected in the Best Sellers Rank), stock availability, price relative to comparable listings, and the number and quality of reviews. Amazon doesn't publish exactly how these signals are weighted, only the general direction: sales performance and customer satisfaction carry noticeably more weight than keyword presence alone.

For any brand selling on Amazon, understanding this discipline is the difference between a visible listing and one buried on page twenty. Unlike SEO for an owned website, there's little room here for long-term strategies built on domain authority: a two-day stockout or a brief dip in conversion rate can cost positions almost immediately. Ranking drops here often show up within hours, not weeks the way a classic Google update might take to settle.

This also shifts daily priorities. An e-commerce team selling across several channels needs to separate its own website's SEO from marketplace SEO, with different metrics and levers for each. Mixing the two leads to familiar mistakes, like expecting a backlink to move Amazon rankings, or neglecting stock because a listing is "already ranking well." Assumptions like these persist because many of the underlying habits come from classic SEO, where they actually work, just not on Amazon.

This article covers the definition and core concepts of Amazon SEO as a discipline. For a full step-by-step implementation guide, we maintain a dedicated Amazon SEO service page.

• Research the actual search terms buyers use inside Amazon, not just Google keywords, and place them in the title, bullet points and backend search terms.
• Keep stock available: a stockout weakens ranking even after the product is back in stock.
• Track price against comparable listings, since Amazon treats it as a direct ranking signal.
• Build reviews actively through the channels Amazon allows, without prohibited incentives.
• Monitor Best Sellers Rank and conversion rate as tracking metrics, not just traffic volume.
• Use images that meet Amazon's technical requirements, since they directly affect CTR and, through it, conversion.

• Applying Google SEO tactics, like link building, and expecting them to move Amazon rankings.
• Stuffing the title with repeated keywords instead of writing one buyers can actually read.
• Letting a product run out of stock without measuring the later impact on ranking.
• Presenting "A10" as an official algorithm documented by Amazon rather than an informal industry term.
• Ignoring the link between price and ranking, setting prices without comparing them to similar listings.