Amazon SEO guide · updated November 2026

Amazon SEO in 2026: How Amazon Search Ranks Your Listings

How relevance and sales decide Amazon rankings, what changed in 2026, and the limit and job of every listing field, from the 75-character title to the 249-byte search terms.

Short answer

Amazon SEO is the work of optimizing a product listing so it ranks higher in Amazon's own search results and converts more of the shoppers who see it. Amazon first matches a query to the text in your title, Item Highlights, bullet points, description and backend search terms, then orders the matching products by how likely each one is to be bought.

Three rules changed in 2026: titles are limited to 75 characters (since 27 July), a new 125-character Item Highlights field is searchable, and Amazon's AI assistant Rufus became Alexa for Shopping (13 May). Backend search terms stay at 249 bytes.

Thorsten Müller, co-founder of HORAiZON, 12 years in Amazon marketing · Last checked 9 November 2026

What Amazon SEO is

Amazon is a search engine for products. Most shoppers type a query, scan the first results and buy from them, so a product that does not rank for its main queries barely sells, however good it is. Amazon SEO covers everything that moves a listing up for the queries that matter: the words in the listing, and the signals that show Amazon the product sells.

It differs from Google SEO in one important way. Google ranks pages that answer a question well; Amazon ranks products that shoppers buy. Backlinks and article length play no role. A listing can be perfectly written and still slide if it converts worse than the products around it.

How Amazon search ranks products

Amazon does not publish its ranking formula. What is known comes from Amazon's seller guidance and from what sellers can measure. It works in two steps:

The two steps of Amazon search ranking
Step	What decides it	What you control
1. Relevance: is the product shown for this query?	The words in the title, Item Highlights, bullet points, description, backend search terms and product attributes	Keyword research and where each keyword goes
2. Order: where does it appear?	How likely shoppers are to buy it: sales, conversion rate, click-through rate, price, availability, reviews	Images, A+ content, price, stock, reviews, ads that create sales

Amazon's own SEO guide for sellers names listing quality and competitive price as ways to improve ranking and says Sponsored Products ads can help offers rise through search results. Sellers call the system "A9" (after Amazon's former search subsidiary A9.com) or "A10"; neither name is something Amazon uses for its current search. On top of it, Amazon's COSMO research describes a knowledge layer that connects products to shopping intents ("camping in the rain" rather than "waterproof tent"), which is what Alexa for Shopping draws on. The four phases of Amazon ranking show how a listing moves through these signals after launch.

What changed in Amazon SEO in 2026

Most Amazon SEO guides still describe the rules from 2024. These changes matter now:

Titles: 75 characters since 27 July 2026. Amazon cut the title limit from 200 to 75 characters including spaces in every category except media, and rewrites longer titles with its own AI. Amazon reported that more than 984 million titles had been updated by August. Amazon's older seller blog post on SEO still names 200 characters; the title policy is what applies.
Item Highlights: 125 searchable characters. The new field sits below the title in search results and on the detail page. Amazon says title and Item Highlights are both search inputs and neither is weighted above the other.
Rufus became Alexa for Shopping (13 May 2026). Amazon's AI assistant moved into the main search bar for signed-in US shoppers. It answers questions and recommends a handful of products from listing content, reviews and Q&A.
A+ alt text is written by Amazon. Sellers can no longer type keyword-rich alt text into A+ modules, which ended one of the last "hidden keyword" tactics. See the A+ content guide.
Backend search terms: still 249 bytes. Some US categories accept more text since a 2024 rollout, but only the first 249 bytes are reliably indexed.

Every listing field, its limit and its job

Amazon listing fields in 2026: limits, search indexing and purpose
Field	Limit (2026)	Searchable	Its job
Title (item name)	75 characters incl. spaces (media excepted)	Yes	Brand, product type and the attribute that decides the click
Item Highlights	125 characters	Yes	Secondary keywords: material, size, compatibility, use case
Bullet points	Up to 5; length set by the category style guide	Yes	Benefits with the keywords shoppers use, one topic per bullet
Product description	2,000 characters (HTML tags count)	Yes	Details and context; shown when there is no A+ content
Backend search terms	249 bytes (US, UK, EU)	Yes, not visible	Synonyms, spelling variants, other languages; no repeats from the visible text
Product attributes	Category-specific fields	Yes, also for filters	Size, color, material, target audience: every field filled
A+ content	Up to 5 modules (Basic) or 7 (Premium)	No confirmed indexing of body text	Conversion: answer the questions that stop a purchase
Images	Up to 9 in most categories	Read by Amazon's AI, not keyword-indexed	Click-through and conversion; the main image wins the click

The practical rule: every keyword that matters goes into a searchable field exactly once. Repeating a word across title, bullets and backend terms does not add weight; it only wastes space. The backend keywords guide covers the 249 bytes in detail, the bullet point guide the visible copy. For the description, the free description HTML editor keeps the formatting within the 2,000 characters.

Keyword research for Amazon

Amazon keywords come from what shoppers type on Amazon, which is often different from what they type on Google. Good sources, in order of reliability:

Brand Analytics: Search Query Performance (Brand Registry). Shows the queries that lead shoppers to your brand, with impressions, clicks, cart adds and purchases.
Sponsored Products search term report. The real queries that triggered your ads and which of them converted. See the search term report guide.
Product Opportunity Explorer in Seller Central: search volume and trends by niche.
Keyword tools such as Helium 10, Jungle Scout or the HORAiZON ONE Amazon SEO tool, which draws on more than 5.4 million real Amazon search terms.
The Amazon search bar. Autocomplete suggestions show common query patterns for free.

Group the keywords by intent before you write. If two of your ASINs target the same queries, they compete with each other; the keyword cannibalization guide shows how to split them.

Optimizing for Alexa for Shopping

Alexa for Shopping answers questions such as "which headphones are good for running in the rain?" and recommends a few products instead of a page of results. It reads the listing, reviews and customer questions. A listing gives it something to work with when it states in plain text:

Who the product is for and the situations it is used in.
Compatibility, sizes and specifications as facts, not adjectives.
What is in the box and what is not.
The answers to the questions customers keep asking in reviews and Q&A.

None of this replaces keywords: a product still has to be relevant to show up. The Alexa for Shopping (Rufus) optimization guide goes into detail.

The conversion half of Amazon SEO

Text gets a product into the results; sales keep it there. The levers that raise conversion raise rank over time:

Main image and gallery. The main image decides the click; the gallery answers the questions. See AI product images.
A+ content. Amazon says Basic A+ can lift sales by up to 8% and Premium A+ by up to 20%. See the A+ content guide and examples.
Price and availability. Amazon's seller guide links competitive price to ranking; stockouts cost rank that takes weeks to rebuild.
Reviews. Rating and number of reviews shape both clicks and the answers Alexa for Shopping gives.

Amazon SEO service or software?

Sellers searching for an "Amazon SEO service" usually choose between three options:

Ways to do Amazon SEO compared
Option	What you get	Fits
Agency or freelancer	Research and copy done for you, monthly retainer	Brands that want to hand off the work completely
Keyword research suites (Helium 10, Jungle Scout)	Search data, rank tracking, AI text drafts; you write and upload	Sellers who want data and do the work themselves
HORAiZON ONE	Title, Item Highlights, bullets, description, backend keywords, images and A+ created and published via SP-API after approval	Sellers, brands and agencies that want finished listings without copy-and-paste

Amazon SEO with HORAiZON ONE

HORAiZON ONE is an AI platform for Amazon listing optimization that creates product images, listing copy and backend keywords for Amazon sellers, brands and agencies. Its keywords come from more than 5.4 million real Amazon search terms, the copy follows the 75-character title rule and fills Item Highlights, and the backend terms stay within 249 bytes. Approved changes go to Seller Central through the official Selling Partner API.

A text optimization costs 50 credits; a complete optimization with images and Premium A+ costs 150. Every account starts with 300 free credits and no credit card, and paid plans start at €149 a month without a minimum term. HORAiZON ONE does not track rankings or manage PPC; for that, it works next to a research suite. It is used by Amazon sellers, brands and agencies.

Amazon SEO checklist

Main keyword list from Search Query Performance and the search term report, grouped by intent.
Title within 75 characters: brand, product type, the deciding attribute.
Item Highlights (125 characters) filled with the next most important attributes and keywords.
Five bullet points, one topic each, benefits first, keywords used naturally.
Backend search terms within 249 bytes, no words repeated from the visible text, no brand names.
Every product attribute and filter field filled.
Main image compliant; gallery answers the open questions; A+ live.
Plain-text facts for Alexa for Shopping: use cases, compatibility, what's in the box.
Indexing checked for the main keywords; Search Query Performance compared after 4 weeks.

For a full review of an existing listing, use the Amazon listing audit.

Get a listing that follows the 2026 rules

Connect your store, pick a product and get title, Item Highlights, bullets, backend keywords, images and A+ in one go, published to Amazon when you approve.

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Amazon SEO in 2026: key facts

Definition: Optimizing a product listing so it ranks higher in Amazon search and converts more shoppers
Ranking logic: Relevance (listing text and attributes), then likelihood of purchase (sales, conversion, price, availability, reviews)
Algorithm name: "A9" / "A10" are seller terms; Amazon does not publish a name or formula
Title limit: 75 characters incl. spaces, all categories except media, since 27 July 2026
Item Highlights: 125 characters, searchable, shown below the title
Backend search terms: 249 bytes (US, UK, EU); Japan 500, India 200
Description: 2,000 characters, HTML tags included
AI assistant: Alexa for Shopping (named Rufus until 13 May 2026)
A+ content and ranking: No confirmed indexing of body text; affects ranking through conversion
Amazon's own tools: Brand Analytics (Search Query Performance), search term report, Product Opportunity Explorer
Not included in Amazon SEO: Backlinks, article length, Google rankings
Last checked: 9 November 2026

Amazon SEO: FAQ

What is Amazon SEO?

Amazon SEO is the work of optimizing a product listing so it ranks higher in Amazon's own search results and converts more of the shoppers who see it. It covers keyword research, the title, Item Highlights, bullet points, description and backend search terms, plus the signals that make a listing sell: images, A+ content, price, reviews and availability.

How does the Amazon search algorithm work?

Amazon search first decides which products are relevant to a query, mainly from the text in the listing, and then orders them by how likely each one is to be bought. Amazon's own seller guide names listing quality, price and Sponsored Products ads as things that help offers rise in search. Sellers call the system A9 or A10; Amazon has never published either name as its current algorithm.

How long can an Amazon product title be in 2026?

Since 27 July 2026, Amazon product titles may be 75 characters long including spaces, in every category except media. Amazon rewrites longer titles with AI. A new Item Highlights field adds 125 searchable characters for the attributes that no longer fit in the title.

How many backend keywords can I use on Amazon?

Amazon's documentation asks for backend search terms under 250 bytes per ASIN, and 249 bytes is the limit that is safe to use in the US, UK and EU. Japan allows 500 bytes and India 200. Letters with accents use 2 bytes, so count bytes, not characters.

Does Alexa for Shopping change Amazon SEO?

Yes. Amazon renamed its AI shopping assistant Rufus to Alexa for Shopping on 13 May 2026, and it now sits in the main search bar for signed-in US shoppers. It answers questions from listing content, reviews and Q&A, so listings that state use cases, compatibility and specifications in plain text are easier for it to recommend. Keyword relevance in the title, Item Highlights and backend terms still decides whether a product shows up at all.

Should I hire an Amazon SEO service or use software?

An Amazon SEO agency does the research and writing for you and typically charges a monthly retainer; software gives you the data and drafts and you decide. HORAiZON ONE, an AI platform for Amazon listing optimization, sits in between: it creates the title, Item Highlights, bullet points, backend keywords, images and A+ content from Amazon search data and publishes them through the SP-API after you approve. Plans start at €149 a month; every account starts with 300 free credits.

How long does Amazon SEO take to work?

Indexing of new keywords usually shows within days; ranking gains follow sales, so they take weeks and depend on traffic and conversion. Check indexing by searching your ASIN with the keyword, and measure ranking and conversion in Brand Analytics' Search Query Performance dashboard before and after a change.

Sources

Checked November 9, 2026. Amazon changes listing rules without much notice; the style guide for your category in Seller Central is the final word.