How many keywords can you use on Amazon has no single answer, because Amazon does not count keywords.
It counts characters, bytes, and targets, and each field uses a different unit. That is why the question
feels unanswerable: you are asking for a number the platform does not track.
Here is the honest version. There is no keyword limit on a title, only a character limit. There is no
keyword limit on the backend field, only 250 bytes. Ad groups do have a target limit, and it is far higher
than anybody should use.
So the useful answer is two numbers per field: what Amazon permits, and what I’d actually use.
Every limit in one table
| Field | Amazon’s limit | What I’d actually use |
|---|---|---|
| Product title | Character limit, varies by category, commonly up to 200 | 60 to 80 characters, front-loaded |
| Bullet points | 5 bullets, a few hundred characters each by category | All 5, keywords in the first 2 |
| Product description | Around 2,000 characters | Full length, or A+ instead |
| A+ Content | Module-dependent | Not for keywords, it is barely indexed |
| Backend search terms | 250 bytes, not characters | Fill it, no repeats |
| Other backend attributes | Per-field limits | Fill every relevant one |
| Sponsored Products ad group | Up to around 1,000 targets | 10 to 30, one ASIN per group |
| Negative keywords | Generous per campaign | As many as your data justifies |
The row people misread is the backend one. 250 bytes is not 250 characters. Accented and non-Latin
characters cost two or three bytes each, so a Japanese or Arabic field holds far fewer characters than an
English one, and in our experience that catches sellers expanding internationally.
The row people ignore is A+ Content. It is a poor place to put keywords because much of it is images,
and text in an image is not indexed at all. I’d write A+ for the shopper who is already interested.
Why “how many keywords” is the wrong question
Three reasons, and understanding them changes what you do next.
Amazon indexes the listing as a whole and deduplicates. A word in your title is already indexed. Adding
it to the backend field again spends bytes and adds nothing. So your effective keyword count is the number
of unique relevant words across the entire listing, not the sum of what each field can hold.
Word order does not matter for matching. Amazon combines words, so you do not need to write phrases. You
need the words present somewhere. This alone frees up more space than any other single realization, in our
experience.
Relevance decides eligibility, not position. More keywords can make you eligible for more searches. They
do not move you up for searches you already appear in. I’d hold that distinction firmly, because it is where
most keyword effort is misspent.
The title, which is not a keyword field
The single most misunderstood field on a listing.
Character limits vary by category and Amazon has tightened them repeatedly. Check yours in Seller Central rather
than assuming a universal number. I’d verify before drafting.
Longer is not better. The limit is not a target. A title stuffed to 200 characters reads as spam to
the shopper who is deciding, and the shopper is the one who decides.
60 to 80 characters is where I’d aim for most categories, because that is roughly what survives
truncation on a phone, and most Amazon traffic is on a phone.
Front-load. Brand, product, then the single attribute that decides the purchase. Everything beyond that is
read by a minority, and I’d write it in that order deliberately.
One attribute, not seven. When I have rewritten stuffed titles, cutting them improved click share
rather than harming it.
Bullets, and where the keywords actually go
Five bullets, and an uneven distribution of value.
The first two do nearly all the work. People stop reading. So your important terms belong there, worked
into a sentence rather than listed.
Character limits differ by category, generally a few hundred per bullet. Fill them with information
rather than with terms, and I’d measure the value in questions answered.
Lead with the benefit, then the specification that proves it. “Fits infants 4 to 12 months” carries a
keyword and answers a question at once. That is the shape to aim for.
Do not list keywords. A bullet reading like a keyword string converts worse and looks worse. In our
experience it is the fastest way to signal an amateur listing.
Backend search terms: 250 bytes, spent well
The one field that is genuinely a keyword field.
No commas, no punctuation, single spaces. Commas consume bytes and match nothing.
No repeats of words already in your title or bullets. The biggest waste in the field.
No competitor brand names. That is a policy violation rather than a missed opportunity, and in our experience it is the mistake that costs listings.
Use it for what will not fit elsewhere: synonyms, spelling variants, use cases, occasions. Our guide to
Amazon backend keywords covers the byte counting, the
prohibited list, and how to verify a term actually indexed.
Advertising, where the number really does matter
Amazon permits far more targets than any sane account uses.
An ad group can hold around a thousand targets. Do not. I have never seen an account benefit from more than a few dozen.
10 to 30 per ad group, with one ASIN per group. That keeps the data readable and lets you bid from each
product’s own break-even. Our guide to
Amazon PPC campaign structure covers the shape.
Fewer, funded properly, beats many starved. Amazon needs delivery volume to produce a readable result,
and a thousand targets on one budget produces noise. I’d rather have 15 keywords with real data.
Negative keywords are the exception. Add as many as your search term report justifies. Our guide to
optimizing negative keywords covers the
mechanics.
Harvest, then narrow. Start broader to discover terms, then promote winners into their own tight groups. I’d
review at 4 weeks rather than weekly, since in my experience anything faster is noise.
Where the limits bite in practice
Abstract limits are easy to nod at. Here is where sellers actually run out of room.
Titles in categories Amazon has tightened. Several categories now enforce shorter titles than sellers
remember, and an over-length title can be truncated or suppressed rather than merely trimmed. I’d check the
current figure for your category rather than reusing a number from an older listing.
Bullets in technical categories. When a product genuinely needs six specifications explained, five
bullets is a real constraint. The answer is not to cram, it is to move detail into A+ Content and images,
and in our experience sellers resist that because the bullets feel like the safer place.
The backend field in any non-English marketplace. 250 bytes disappears fast when characters cost two or
three each. When I have audited European and Japanese listings, silent truncation was present more often
than not.
Ad groups after a year of harvesting. Terms accumulate. Nobody prunes them. An ad group that started
with 20 targets carries 200 by the second year, most contributing nothing, and I’d run a subtraction pass
every quarter.
A rough test worth applying. If you cannot say what each keyword in an ad group is there to do, it is
not a keyword strategy. It is an archive.
What to do when you run out of space
Five moves, in the order I’d try them.
Delete the repeats first. Words already in the title do not need to be in the backend field. This alone
frees up a surprising share of the budget.
Strip stop words and punctuation. “The”, “for”, “with”, commas. All bytes, no matching value.
Drop plurals. Amazon handles stemming, so both forms are rarely necessary.
Move detail into images. A specification in an image is not indexed, and it is also not competing for
character budget. For the shopper it frequently communicates better anyway.
Then accept a limit. If a term genuinely will not fit anywhere, it was probably a low-volume term.
Confirm it in the demand report before mourning it, and in my experience it usually was.
How many keywords do you actually need?
The answer nobody gives, so here is a concrete one.
Most products have fewer genuinely relevant keywords than sellers think. Perhaps 20 to 50 words that
matter, including synonyms and variants. Beyond that you are adding terms with no volume, and a keyword with
no volume is not a cheap opportunity. It is nothing.
Find the real ones from your own data. Your search term report shows what shoppers actually typed before
clicking your ads. This beats any tool because it is your product’s demand rather than a category
estimate.
Then check demand rank. Our guide to
Amazon Search Frequency Rank covers reading the Brand
Analytics report, and remember rank 1 is the most searched term, so lower is better.
Then place each word once, in the strongest field it fits. That is the whole job. It takes an
afternoon rather than a week, and in our experience the afternoon version outperforms the week version.
If you would rather have a listing built and indexed properly, that sits inside our
listing optimization service. We have
optimized 10,000+ listings, and we are an Amazon Ads partner and an Amazon SPN Verified Partner.
FAQ
How many keywords can you use on Amazon?
Amazon does not count keywords, it counts characters, bytes, and advertising targets. Titles and bullets
have character limits that vary by category, the backend search terms field holds 250 bytes, and a
Sponsored Products ad group accepts roughly a thousand targets, of which you should use far fewer.
How many keywords should be in an Amazon title?
There is no keyword limit, only a character limit that varies by category and commonly reaches 200. Aim for
60 to 80 characters with the brand, the product, and the one attribute that decides the purchase, since
that is roughly what survives truncation on a phone.
Is the Amazon backend field 250 characters or 250 bytes?
250 bytes. Standard letters, numbers, and spaces cost one byte each, while accented and non-Latin
characters cost two or three, so a non-English field holds considerably fewer characters than an English
one and truncation happens silently.
How many keywords should I put in an Amazon ad group?
Between 10 and 30, with one ASIN per ad group, even though Amazon permits roughly a thousand. Fewer targets
funded properly produce readable data, whereas hundreds on a single budget produce noise you will then
optimize against.
Do I need to repeat keywords across Amazon listing fields?
No. Amazon indexes the listing as a whole and deduplicates, so a word in your title is already indexed and
repeating it in the backend field wastes bytes. Place each word once, in the strongest field it fits.
How many keywords does a product actually need?
Most products have perhaps 20 to 50 genuinely relevant words including synonyms and variants. Beyond that
you are adding terms with no search volume, which add no coverage, so identify the real ones from your own
advertising search term report rather than from a category estimate.
Last updated: August 31, 2026. Amazon’s character limits differ by category and marketplace and change
over time, as do advertising target limits; Seller Central and the Amazon Ads console carry the current
figures for your account. Treat every number here as a starting point to verify rather than a fixed rule.
