This page will be dedicated to ongoing article collection and notes on Amazon A9 Algorithm. The page is ongoing and is not yet comprehensive.
- https://en.wikipedia.org/wiki/A9.com (good for research links)
- http://www.merchantwords.com/ A lot of merchants use this site to to research keywords for Amazon. It is a paid site.
- http://keywordtooldominator.com/ Can try for free
Product Research for Amazon
- https://amazeowl.com/ Find the best products to sell on Amazon
- https://www.amztracker.com/ Paid service