We all know and mostly marketers is focusing exclusively on Google to sell their products and in this article it will show you the difference of Google and Amazon and how this will affect most of your online marketing campaign. I want to share this awesome content about how to rank well in Amazon the US's largest product search engine posted by Nathan Grimm from the Moz blog site. Feel free to visit this link for your reference and study the concept of this great content. http://moz.com/blog/amazon-seo-organic-sea...ranking-factors 
