A9 is the name of the Amazon product search algorithm. A9.com is a subsidiary of Amazon who develops the company’s search engine. What is the difference between Google search and Amazon search? The main difference that Amazon is buying platform and it constantly optimizes everthing including search engine to increase sales.
As it states on their website A9 search platform used by Amazon handles 1.2 billion search requests per day and it takes only 200 ms to retrieve search result from Amazon database. As you may guess the Amazon product database is very very huge.
Let’s inspect this alorithm in details by choosing the correct keywords for product.