Amazon COSMO is Amazon's generative-AI recommendation engine. Where the older A9 system ranked search results by keyword match, COSMO uses a large language model to understand shopping intent and context — then generates recommendations drawn from your catalog. If your listing isn't readable to that model, a growing slice of discovery simply passes you by.
| A9 (search) | COSMO (recommendation) | |
|---|---|---|
| What it does | Ranks results for a keyword query | Generates recommendations from intent & context |
| Reads | Title & keyword signals | Meaning, attributes, catalog structure |
| Example query | "yoga mat" | "good mat for hot yoga beginners" |
| Leaks if you | Under-keyword | Write vague, unstructured, non-compliant copy |
Discovery on Amazon is no longer only a search box. COSMO powers zero-click recommendations, "shop for an occasion" journeys, and the context panels Rufus and Alexa pull from. The sellers winning are the ones whose listings are structured, compliant, and machine-readable — the exact signals a recommendation LLM consumes.
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Check your listing for COSMO →