Amazon Keyword Research Using Amazon’s Own Data First
Amazon gives sellers real search volume. Product Opportunity Explorer publishes it per search term, free with a Professional selling account, with no Brand Registry needed. Brand Analytics adds query level performance for brand owners. Your advertising search term report shows which queries actually sold. Sound amazon keyword research runs those first party sources first, then uses paid tools to fill the gaps. Tool volume and Amazon volume count different things, so the two numbers will never agree.
Keyword Research on Amazon: Where the Data Comes From
Four sources sit close to real demand. Every other number you see estimates from them or from scraped search results.
Product Opportunity Explorer reports search volume for terms inside a niche. Search Query Performance reports impressions, clicks, cart adds and purchases for queries that touched your ASINs. Top Search Terms reports a rank. The advertising search term report tells you which queries took money and which gave it back.
| Source | Cost | Eligibility | What the number means | Refresh | API access |
|---|---|---|---|---|---|
| Product Opportunity Explorer | Free | Professional plan. No Brand Registry | Search volume per term in a niche | Weekly. New niches monthly | None |
| Search Query Performance | Free | Brand Registry | Impressions, clicks, cart adds, purchases per query | Weekly to quarterly | Reports API |
| Top Search Terms | Free | Brand Registry | A search frequency rank, not a volume | Daily to quarterly | Reports API |
| Advertising search term report | Free with an ads account | Any seller running ads | Real queries with spend, orders and sales | Daily | Amazon Ads API |
Amazon lists these report types in its Analytics report type values documentation. The one gap in that column matters. Product Opportunity Explorer has no API endpoint, so a tool cannot resell you its numbers.
Product Opportunity Explorer, the Tool Most Sellers Never Open
Start here, because it costs nothing beyond the Professional plan you already pay for. Amazon’s Product Opportunity Explorer page prices that plan at $39.99 a month plus selling fees. Brand Registry does not gate the tool. Most guides get that wrong and send unbranded sellers straight to a paid subscription.
In Seller Central, hover over Growth in the main menu and click Product Opportunity Explorer. If the menu item never appears, the permission sits switched off. Go to Settings, then User Permissions, then Manage Global Permissions, then turn on New Product Opportunities.
Inside a niche you get search terms with volume, click share and search conversion rate, plus the products winning those clicks. Amazon adds year on year and quarter on quarter movement, out of stock rates, the share of offers with Prime, Sponsored Products usage, seasonality and return reasons. That last one is underrated. A term with strong volume and ugly return activity is a warning, not an opening.
Cadence shapes how you use it. Amazon’s Product Opportunity Explorer guide states that “niche metrics are refreshed at the beginning of each week”. It also says “new niches are created at the start of each month”. Pull weekly. Do not expect a brand new niche to appear mid month.
Brand Analytics, If You Hold Brand Registry
Brand Analytics needs a Professional selling plan plus enrolment in Amazon Brand Registry with an active registered trademark. Amazon’s Brand Analytics overview, published 8 October 2025, names seven dashboards. They are Search Query Performance, Search Catalog Performance, Top Search Terms, Repeat Purchase Behavior, Demographics, Market Basket Analysis and Customer Loyalty Analytics.
Two of them do keyword work. Search Query Performance shows impressions, clicks, cart adds and other sales metrics for specific queries, with your brand share beside the total for that query. Search Catalog Performance flips the view to the ASIN, so you can see which listing carries which queries.
Top Search Terms works differently, and the difference trips people up. It reports a search frequency rank. Rank one means the most searched term in that marketplace for that period. It does not tell you how many people searched. Nobody outside Amazon knows the gap between rank 40 and rank 4,000. Any tool converting a rank into a monthly volume applies a curve it invented. Treat that output as an ordering, never as a count.
Why Your Tool and Amazon Disagree
This is the part worth understanding once, properly, because it settles a dozen arguments.
Helium 10 has said publicly that it once pulled search volume straight from Amazon. Its search volume post puts it plainly. “Back when I first started at Helium 10, circa 2018, we were gathering search volume directly from Amazon.” The same piece adds that “one day in 2018, Amazon closed it off”. Its data scientists then built an algorithm from the historical data. Helium 10 calls the current figure “an estimation”.
The second half matters more. Helium 10 published an August 2024 comparison. It states that its search volume “has always been based on normalized searches”. Normalised means one shopper searching a term three times in a session counts once. Search Query Performance does not work that way. It counts the raw events.
| Source | What it counts | Normalised | Comparable to |
|---|---|---|---|
| Helium 10 estimate | Modelled 30 day searches | Yes | Other normalised estimates |
| Top Search Terms | Relative rank position | Yes | Other ranks in the same period |
| Search Query Performance | Query impressions tied to your ASINs | No | Itself, week over week |
| Product Opportunity Explorer | Searches inside a niche | No | Other terms in the same niche |
So a tool showing 40,000 and Amazon showing 95,000 does not prove either wrong. The two count different events. Comparing them is a unit error, like weighing one thing in pounds and another in kilos and calling the scale broken. Compare each source against itself over time. Never across.
The Search Terms Field Is 250 Bytes, Not 250 Characters
The most repeated error in this topic sits in the backend field. The limit runs in bytes.
The announcement quoted on Seller Forums sets the cap at “less than 250, 200 for India, 500 for Japan”. It then says the length limit “applies to total content in all generic keyword fields (a max. of 5 attributes)”. The last line is the one to read twice. “Whole entry will be rejected upon exceeding limit.”
Three things follow. The cap covers the combined content across up to five generic keyword attributes, not each one. Amazon rejects the whole entry when you go over, so a single extra byte can drop every keyword you submitted. And plain English letters cost one byte each, while accented and non Latin characters cost two or more. Write “café” and you spent five bytes on four letters.
Amazon’s keyword research guidance, dated 1 October 2024, adds the writing rules. Use all lowercase. Separate terms with single spaces. Skip words already in your title, bullets or description. Drop articles and prepositions, since they earn nothing. Add abbreviations, alternate names and related terms that shoppers type but that read badly on the page.
| Field | Limit | Unit | Source |
|---|---|---|---|
| Product title | 75 | Characters including spaces | Seller Forums title announcement, effective 27 July 2026 |
| Item Highlights | 125 | Characters | Same announcement |
| Bullet points | Varies by category | Characters | Category style guide in Seller Central |
| Search terms | 250, 200 India, 500 Japan | Bytes, combined across five attributes | Seller Forums generic keyword announcement |
A Method You Can Run This Week
Run these five stages in order. Each one feeds the next, and skipping a stage costs you later.
- Seed. Type your product category into the Amazon search bar and record every auto-complete suggestion. Repeat with the two or three words a customer would use before they learn your category’s jargon. Amazon names its own search bar as a keyword source. Twenty minutes gets you a hundred raw terms.
- Size. Open Product Opportunity Explorer, find the niche, and look up each seed on the search terms tab. Keep volume, click share and search conversion rate together. A term with heavy volume and a weak conversion rate sells for somebody else, not for you.
- Expand. Pull the top ten ASINs on each sized term and read their titles, bullets and reviews. Reviews give you the language shoppers use for the problem, which rarely matches the language sellers use for the product.
- Validate. With Brand Registry, check each candidate in Search Query Performance. You now see the impressions, clicks, cart adds and purchases that query drove against your own ASINs. Terms with impressions but no cart adds are relevance problems, not ranking problems.
- Confirm. Download the advertising search term report. This is the only source that ties a customer query to money. Anything with orders belongs on the list. Anything with spend and no orders comes off it.
Rank the survivors by contribution, meaning units or revenue traceable to that term, not by volume. Volume tells you how many people walked past the shop. Contribution tells you who came in and bought. If you have run ads for a quarter, you already hold the second number.
Where Each Keyword Goes After the Title Change
Placement carries more weight since 27 July 2026. Amazon capped titles at 75 characters that day and added a searchable 125 character Item Highlights field. Fewer slots mean sharper choices. We cover the mechanics in full under the 75 character title rule.
| Contribution tier | Field | Limit | Notes |
|---|---|---|---|
| Top one or two terms | Product title | 75 characters | Brand, then the term a buyer types, then the deciding attribute |
| Next three to five | Item Highlights | 125 characters | Amazon says this field feeds search alongside the title |
| Supporting terms | Bullet points | Category dependent | Write for a reader, place the term inside a real benefit |
| Long tail and variants | Search terms | 250 bytes total | Nothing already used above, lowercase, spaces only |
One rule holds across all four. Do not repeat a term you already placed. Amazon’s own guidance tells sellers to avoid duplicating keywords already present in the title, bullets or description. Repetition burns bytes you could spend on a term you do not yet rank for.
How to Check Whether You Are Indexed
Amazon publishes no index checker. So use the storefront itself. Search the exact term with your ASIN appended, for example waterproof dog coat B0XXXXXXXX. If your listing returns, Amazon associates that term with your ASIN. If it returns nothing, you hold no index for it.
Check a term twice on different days before acting. Search results shift, and one blank result proves little.
Indexing drops quietly, and the causes are dull rather than mysterious. A suppressed or stranded listing stops returning. A variation change moves the child ASIN. A flat file upload with an empty generic keyword field wipes the old values, because a blank does not mean “leave as is”. A category change resets attribute handling. Sellers post about vanished keywords and reset rankings constantly, and the answer is almost always one of those four.
Fix it by resubmitting the field with full content, confirming the listing is active and buyable, and waiting for a full crawl before you judge. Then log the change with a date so the next drop takes minutes to diagnose. Our wider guide to Amazon SEO tools covers what to automate here.
Keyword Research for KDP
Book search runs on the same engine with a different form. KDP gives you seven keyword slots plus categories, and Amazon’s guidance is to combine words in the order a reader would search them.
The useful angle is that book buyers search by setting, character type, plot theme and tone rather than by product attribute. “Slow burn enemies to lovers” is a keyword. “Paperback romance novel” is a category. Product Opportunity Explorer covers books unevenly, so the search bar and the bestseller lists carry more weight here. We handle this in depth on our Amazon KDP services page.
Mistakes That Cost the Most
Chasing volume over contribution. The biggest term in your niche is usually the one with the worst conversion rate for a new listing, because incumbents own the click share. Rank for what converts, then climb.
Targeting head terms with no path to a sale. If the top ten results all hold four figure review counts and you hold twelve, that term is a paid acquisition cost, not an organic plan.
Repeating one keyword across every field. It adds no weight and eats space.
Ignoring the advertising search term report. Every other source predicts. That one records. Sellers running Amazon PPC already own a converted query list and mostly never open it.
Trusting a rank as a volume. Search frequency rank orders terms. It does not size them.
Frequently Asked Questions
How do I do keyword research for Amazon?
Seed terms from the Amazon search bar. Size them in Product Opportunity Explorer, then expand from competitor ASINs and reviews. Validate in Search Query Performance if you hold Brand Registry. Confirm against your advertising search term report. Rank the surviving terms by contribution, meaning units or revenue tied to the term, rather than by search volume.
Does Amazon give sellers real search volume?
Yes. Product Opportunity Explorer publishes search volume per term inside a niche, free with a Professional selling account. Search Query Performance publishes impressions, clicks, cart adds and purchases per query for brand registered sellers. These are Amazon’s own counts, not estimates, though the two tools count in different units.
Is Product Opportunity Explorer free?
Yes. It carries no extra fee beyond the Professional selling plan, which Amazon prices at $39.99 a month plus selling fees. You reach it by hovering over Growth in the Seller Central main menu. If it does not show, switch on New Product Opportunities under Settings, User Permissions, Manage Global Permissions.
Do I need Brand Registry for Product Opportunity Explorer?
No. Brand Registry gates Brand Analytics, not Product Opportunity Explorer. Any seller on a Professional plan can open it. Many guides state the opposite and push unbranded sellers toward paid subscriptions they do not need yet. Check the Growth menu before you buy anything.
Why does Helium 10 show different search volume than Amazon?
Because they count different events. Helium 10 says Amazon opened internal search volume to tools around 2018 and closed it later that year, so its figure is now a modelled estimate. It also says its volume is normalised, meaning repeat searches in one session count once. Search Query Performance is denormalised.
What is search frequency rank?
A position, not a count. Top Search Terms in Brand Analytics ranks terms by how often shoppers search them in a marketplace and period. Rank one is the most searched. Amazon never publishes the volume behind any rank, so converting a rank into a monthly number is guesswork by whoever did the converting.
Is the backend search terms limit 250 characters or bytes?
Bytes. Amazon’s announcement says the length limit “applies to total content in all generic keyword fields (a max. of 5 attributes)” and that the “whole entry will be rejected upon exceeding limit”. The cap is under 250 bytes, with 200 in India and 500 in Japan. Accented characters cost two bytes each.
Should I repeat keywords in the title and bullets?
No. Amazon tells sellers to avoid duplicating keywords already present in the title, bullet points or description. Repetition adds no ranking weight and wastes room you could give to a term you do not yet rank for. Place each term once, in the highest value field it earns.
How do I find the keywords my competitors rank for?
Take the top ten ASINs on a term you already sized, then read their titles, bullets and reviews for the words shoppers repeat. Search Catalog Performance shows which queries reach your own ASINs. For rival ASINs, third party tools estimate from scraped results, so treat those figures as direction rather than fact.
How do I check if my listing is indexed for a keyword?
Search the exact phrase followed by your ASIN in the Amazon search bar. If the listing returns, Amazon holds an index for that term. If nothing returns, it does not. Repeat the check on a second day before you act, since search results move and one blank result proves little.
Where do keywords go now that titles are capped at 75 characters?
Your one or two highest contribution terms go in the 75 character title. The next tier goes in Item Highlights, which Amazon says feeds search alongside the title. Supporting terms sit inside bullet points written for a reader. Long tail variants go in the 250 byte search terms field, with no repeats.
How is KDP keyword research different?
KDP gives seven keyword slots plus category selections rather than a title, bullets and backend field. Readers search by setting, character type, plot theme and tone instead of product attributes. Word order matters, since Amazon advises combining terms the way a reader would type them. Book niche coverage in Product Opportunity Explorer is thinner.
Want This Run on Your Catalogue
We do this work daily for sellers who would rather spend the week selling. Want a second pair of eyes on your term list, field limits and index coverage? Our Amazon SEO and listing optimisation service starts with a free audit. You keep every file and login either way.
