Amazon backend search terms: the field most sellers waste
It is the only keyword space a buyer never sees, so it should carry what the title and bullets cannot. Here is what to put in it, what to leave out, and how to tell whether it is working.
Backend search terms are the hidden keyword field on an Amazon listing, called Search Terms in Seller Central and generic_keywords in the flat file. Fill it with words a buyer types that your title and bullets do not already say: synonyms, transliterations and use cases, space separated, with no repeats and no competitor brands.
- The field is Search Terms on the Keywords tab, or generic_keywords in a flat file. Buyers never see it.
- Sellers work to a 250 byte ceiling, and bytes are not characters: a Devanagari letter costs three bytes.
- Put in only what the visible copy lacks: synonyms, Roman-script Hindi, use cases and spelling variants buyers actually type.
- Leave out competitor brands, ASINs, words like best or sale, and anything already in your title.
- Test it by searching your own product with the new term after the change has had time to index.
Most Indian sellers either leave this field empty or paste the title into it again. Both waste it. The title and bullets are already searchable, so the backend field earns its keep only when it holds the words those cannot: the Hinglish spelling, the regional name, the occasion, the problem the product solves.
Where the field lives, and what it is called
In Seller Central, open the listing through Manage All Inventory, choose Edit, and go to the Keywords tab. The box labelled Search Terms is the backend field. Some categories show additional keyword boxes on the same tab, such as intended use or target audience, which do separate jobs and should not be treated as overflow space.
In a category flat file the same field is the column generic_keywords. If you list through a template, this is the column to fill, and a value in it overwrites whatever was there when the file processes. That catches sellers who edit the field by hand and then upload an old template a month later.
The field is attached to your offer on the ASIN. When several sellers sell one ASIN, the detail page shows one set of visible copy, but each contributor can supply search terms. If you created the ASIN, take this field seriously, because it is one of the few parts of the page you still control.
The limit is in bytes, not characters
The figure the market works to is 250 bytes. Amazon publishes the rule in its style guides, which on amazon.in sit behind a Seller Central login, so treat 250 as the working ceiling rather than a number we have read on an Indian page. Sellers widely report that an entry over the limit is not partly indexed but ignored, which is why going over is worse than leaving a few words out.
A byte is not a character. Plain English letters, digits and spaces cost one byte each. A Devanagari letter costs three bytes, and a conjunct or a vowel sign adds more. The word saree is 5 bytes typed in English and 15 bytes typed in Hindi script. The word kurti is 5 bytes in English and 18 in Hindi script.
So a field written in Hindi script holds roughly a third of the words the same field holds in Roman script. Most Indian buyers who search in Hindi type it in Roman letters on an English keyboard anyway, so Roman-script Hindi usually gives you more reach per byte. Count bytes before you save: paste the text into a byte counter, not a character counter.
What belongs in it
Start from the words a buyer types that your visible copy does not contain. For a cotton kurti that might be the Roman-script Hindi names, the regional names used in the states you ship to most, the occasions it is bought for, and the problem it solves, such as summer wear or office wear.
Add spelling variants that buyers genuinely use, such as kurti and kurtee, or lehenga and lehnga. Amazon search handles plurals and capitalisation on its own, so you do not need both kurti and kurtis, or Saree and saree.
Write the words space separated, in lower case, with no commas or punctuation. Punctuation costs bytes and adds nothing. Word order inside the field matters far less than in the title, so do not spend bytes building phrases: cotton office kurti summer is as useful as a sentence and shorter.
Then remove anything already in your title, bullets or brand field. Repeating a word does not add weight, it only spends bytes you could have used on a word that is missing.
What to leave out, because it can cost you
Competitor brand names and other sellers' ASINs. They are against Amazon's listing policies, and a listing that targets another brand's name invites a complaint from that brand. Your own brand is already indexed through the brand field.
Subjective and temporary words: best, cheapest, top rated, new, latest, sale, offer, discount. Buyers rarely search them, and claims of this kind are exactly what a listing review removes.
Anything unrelated to the product, written to catch traffic. Irrelevant terms bring sessions that do not convert, and a listing with many sessions and few orders looks worse, not better.
Do not use the field to fix a weak title. If a word is the main thing buyers search for, it belongs in the title, where it also tells the buyer they are in the right place.
Finding the words buyers actually type
Type the start of your product name into the amazon.in search box and read the suggestions. They come from what buyers search, and they show the Hinglish spellings and the pairings, such as kurti for women cotton, that a desk exercise misses.
If you run Sponsored Products, the search term report in the advertising console lists the exact queries that led to clicks and orders on your ads. It is the most honest list of buyer language you will get, because it records what was typed, not what a tool estimated.
Read your return reasons and the questions on your listing. A buyer asking whether a bottle fits a car cup holder is telling you the use case to add.
Every field on the listing doing a different job
Visible copy for the buyer, the backend field for the words it cannot carry
Checking whether a term is working
After you save, the change takes some time to reach search. A method sellers use is to search amazon.in for your ASIN together with the new word. If the listing comes back, the word is indexed against it. If it does not come back after a day or two, check the byte count first, because an over-limit field is the commonest reason nothing changed.
Then watch the Detail Page Sales and Traffic by Child Item report in Business Reports for that ASIN. Sessions rising with no change in orders means the new words brought the wrong buyers. Sessions flat means the words were not indexed or nobody searches them.
Change the field one listing at a time and note the date, so you can read the effect against the report rather than guess at it.
The part of this Robnu does for you
Robnu reads your Amazon account and reconciles every settlement line back to the order that caused it, so a wrong deduction is visible the day it lands.
- Orders, returns, payouts and inventory synced
- Every settlement line matched to its order
- FBA units Amazon has not made good, listed
Where this sits in the rest of your Amazon operation
On Amazon, Robnu syncs your orders, returns, payouts and inventory, reconciles every settlement line back to the order that caused it, lists the FBA units Amazon's own ledger has not made good, flags a return that never came back before the SAFE-T window closes, and scans returns in at your dock. It reads your Amazon account rather than writing to it, so accepting orders and making labels run on AJIO and Meesho today. Related reading:
Sources & further reading
- Amazon India, how to list your products the one publicly readable Amazon.in page that states listing figures: title 200 characters, images 500x500 or 1,000x1,000. Read 5 November 2026.
- Amazon listing and image style guides login-gated. It redirects to Amazon sign-in, so the detailed rules it holds are not quoted here and are described as market convention instead. Read 5 November 2026.
- Amazon India seller forums where the failure shapes described here are reported by sellers. Read 5 November 2026.
Not legal or tax advice. Amazon changes fees, windows and policies without notice, and the detailed style guides and account-health thresholds sit behind a Seller Central login, so any figure quoted here as convention is not Amazon-published. Check anything you plan to act on against your own Seller Central account first.
Questions sellers ask
Sellers work to 250 bytes, and bytes are not characters. English letters and spaces cost one byte, a Devanagari letter costs three. The detailed rule sits in Amazon's style guide, which needs a Seller Central login on amazon.in, so count bytes before saving.
No. Use spaces. Commas and other punctuation cost bytes and add nothing to matching. Lower case, single spaces, no repeats.
No. Other brands' names and ASINs are against Amazon's listing policies and invite a complaint from the brand owner. Your own brand is already indexed through the brand field.
Usually in English letters. Most Indian buyers type Hindi words on an English keyboard, and each Devanagari letter costs three bytes, so Roman script fits about three times as many words into the same field.
No. The title is already indexed. Repeating a word adds no weight and spends bytes you could use on a word the listing does not yet contain.
The commonest cause is a field over the byte limit, which sellers report is ignored rather than partly read. Check the byte count, then search your ASIN with the new word to see whether it is indexed.
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