A10 Algorithm is Amazon's search ranking algorithm (successor to A9). It determines which products appear for which search queries + in what order.
Key ranking signals (per public Amazon documentation + observed behaviour):
- Sales velocity for the query
- Conversion rate from search to purchase
- Customer review quality + recency
- Title + bullets + backend keyword relevance
- Listing quality + completeness
- Sponsored Ads click-through (modest signal)
A10 changes constantly; the operational discipline is to optimise for current ranked behaviour (regular listing audits + backend keyword refreshes) rather than chase rumoured changes. See our Amazon Listing Optimisation for the practical playbook.