A9 is said to be the organic product ranking algorithm for Amazon, and it contains direct and indirect variables that are used to balance the search requests of consumers with items they are most inclined to buy. Almost a major bisection of the campaign to sell on Amazon makes sure the products are exposed to the audience.

A9.com is a division of Amazon that builds advertisement technology searches for search engines. A9 is premised in Palo Alto, California (USA), and has teams operating in Tokyo, Dublin, Munich, Bangalore, and Beijing. A9 has development activities in visual search, cloud, product, virtual reality, advertisement technology, and the addressing of community queries.

The product listing is better refined to succeed in the search results, and only then one can understand how Amazon ranks the products. When the search results tend to rank the products in a higher category, more clicks will result for better performance.