What are Amazon backend keywords?
Amazon backend keywords are search terms you add in Seller Central that shoppers never see. Amazon reads them when deciding which searches your product is relevant for, giving your listing keyword coverage that does not need to appear in the copy buyers actually read. Amazon backend keywords are search terms entered in the backend search terms field inside Seller Central. They sit behind your listing and are never displayed to shoppers, but Amazon reads them as part of its indexing process. Indexing is how Amazon determines which searches a product is eligible to appear in. A product can only show up for a search term if Amazon has indexed it for that term, and backend keywords contribute to that decision alongside the visible content in your title, bullets, and description. Because backend keywords are invisible to buyers, they serve a specific purpose: covering relevant terms that would not fit naturally into the listing copy without making it awkward or harder to read. The most useful backend keywords are terms that are genuinely relevant to your product but that do not already appear in your title or bullet points. Synonyms are a strong starting point, for example a seller listing a bin liner might include bin bag and rubbish bag as backend terms. Abbreviations and shortened forms of terms work well here too. If your title uses the full phrase stainless steel insulated water bottle, a backend term like steel bottle or insulated flask picks up shorter variations without cluttering the listing. Common misspellings of your product type can also be worth including, as some shoppers search with typos and Amazon does not always autocorrect them. Terms in other relevant languages can be useful in multilingual markets where buyers may search in more than one language. Repeating keywords already used in your title, bullets, or description is unnecessary. Amazon does not need to see the same term twice to index a product for it, and repetition takes up space that could be used for additional relevant terms. Competitor brand names and trademarked terms should not appear in your backend keywords. Using them can breach Amazon's guidelines and may result in listing suppression or other enforcement action. Irrelevant terms, misleading claims, and anything that does not accurately describe your product should also be left out. Backend keywords are not a loophole for capturing unrelated traffic, and Amazon's systems are designed to assess relevance across the whole listing. Amazon measures backend keywords in bytes rather than characters. For most Latin-script languages this makes no difference, as a single letter equals one byte. However, for non-Latin scripts such as Japanese, Chinese, or Arabic, a single character can use two or more bytes, which reduces how much you can fit in the field. Most Amazon marketplaces allow up to 250 bytes for backend search terms. The best approach is to use that space efficiently: separate terms with spaces rather than commas, do not add punctuation, and keep terms focused and distinct from each other. If you exceed the byte limit, Amazon may ignore terms beyond the cut-off point. Staying within the limit ensures every term you add is actually read. Keyword Hunters helps sellers identify backend keyword candidates by surfacing relevant terms that are not yet present in the visible listing. You can see which synonyms, variations, and related phrases are worth adding and organise them to fit within the byte limit. The tool draws on live Amazon search data, so the suggestions reflect how real shoppers are searching rather than guesswork or stale keyword lists. Keyword Hunters supports better keyword decisions, but it does not guarantee that adding backend keywords will result in indexing, higher rankings, or increased sales. Backend keywords work best as part of a well-optimised listing with strong, relevant visible content.
Hidden search terms in Seller Central that help Amazon match your product to relevant searches. Learn what backend keywords are and what to include in them.