Amazon backend optimization best practices

No repetition: Don’t repeat words already in your title, bullets, or description. Backend keywords should add new relevant terms.
Relevance is key: Only include keywords truly related to your product to avoid harming your listing.
Character limit: Keep backend keywords within 500 bytes total. Exceeding this can cause indexing failure.
Prioritize high-impact keywords: Focus on relevant, high-volume keywords not already visible on the listing.
Regular updates: Review and update keywords often based on search trends and performance.

No brand names: Avoid your own or competitor brands to prevent penalties.
No punctuation: Separate keywords with spaces only (no commas, periods, etc.).
Use synonyms & misspellings: Cover different spellings, common typos, and related terms.
Avoid filler words: Exclude articles and short prepositions (e.g., "a," "an," "and," "the," "of").
Singular/plural: Usually include just one form, since Amazon accounts for both.
No temporary or subjective words: Avoid "new," "on sale," "best," "cheap," etc.
No offensive or prohibited terms.
No ASINs.
Hyphens can help: They may cover multiple keyword combinations.
Lowercase is fine: Capitalization doesn’t affect indexing.

Intended Use: Describe where/how the product is used (e.g., hiking, camping).
Subject Matter: Add relevant related terms, good for long-tail keywords.
Target Audience: Specify demographic (men, women, kids).
Other Attributes: Use for additional relevant info that aids discoverability.

Use keyword tools like Helium 10, Jungle Scout, MerchantWords for insights.
Check Amazon Brand Analytics (Search Query Performance report) for real shopper searches.
Use Amazon search autocomplete suggestions.
Analyze customer reviews for common language and keywords.
Perform competitor keyword research.