Amazon keyword glossary
Short answers to the terms Amazon sellers and KDP authors meet in keyword research, listings, rankings and ads. Each term has its own page, and each Amazon fact names its source.
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On this page
1.Search and keywords
- Amazon autocomplete
- Amazon autocomplete is the list of search suggestions under Amazon’s search box. Where it comes from, what it shows, and how sellers use it.
- Search volume
- Amazon search volume is how often shoppers search a term. Where real counts exist, why every tool shows an estimate, and how to read one.
- Long-tail keyword
- A long-tail keyword is a longer, more specific search phrase. How Amazon defines it, why it matters, and how to find them.
- Keyword indexing
- A product is indexed for a keyword when Amazon shows it for that search. How sellers check it, and the byte limit that can stop it.
2.Listing fields
- Search Terms field
- Backend search terms are hidden keywords on an Amazon listing. The byte limit, what to put in, and what Amazon tells sellers to leave out.
- Title character limit
- Since 27 July 2026, Amazon titles outside media must be 75 characters or fewer. What changed, what happens to long titles, and Item Highlights.
- Keyword stuffing
- Keyword stuffing is packing a listing with repeated or unrelated keywords. What Amazon and KDP say about it, and what to do instead.
3.Rank, reports and ads
- Organic rank
- Organic rank is where a product shows in Amazon’s search results for a keyword, not counting ads. How it differs from sponsored rank, and how to track it.
- Sponsored rank
- Sponsored rank is where a product’s ad shows for a keyword. How Amazon’s ad auction sets it, what it costs, and how it differs from organic rank.
- Best Sellers Rank
- Best Sellers Rank (BSR) is a product’s sales rank in its category. How Amazon calculates it, how often it updates, and why it isn’t a sales count.
- Brand Analytics
- Amazon Brand Analytics is Amazon’s free set of search and purchase reports for registered brands. Who gets it and what its reports show.
- Search frequency rank
- Search frequency rank (SFR) is Brand Analytics’ ranking of search terms by how often shoppers search them. What it measures and why it isn’t a count.
- Click share
- Click share is the share of a search term’s clicks that went to one product, in Amazon Brand Analytics. How to read it next to conversion share.
- Conversion rate
- Amazon conversion rate, or unit session percentage, is units ordered divided by sessions. How Amazon counts a session, and why the rate can top 100%.
- ACOS
- ACOS, advertising cost of sales, is ad spend divided by ad sales. The formula, a worked example, how it relates to ROAS, and what it leaves out.
4.Products and books
- ASIN
- An ASIN is the 10-character code Amazon gives every product. What it looks like, how books differ, and where to find a product’s ASIN.
- KDP keywords
- KDP keywords are the seven words or phrases you add to a book in Kindle Direct Publishing. How many you get, what KDP bans, and how to choose them.
- KDP categories
- KDP categories are the store sections a book is listed in. You choose 3 in KDP. How they work with keywords and Best Sellers Rank.