Amazon Spark doubles down on discovery

Instead of simply suggesting products based on users’ browsing histories, Amazon is upping the discovery ante with Spark, a personalized feed of content from customers with similar interests.
Spark is available to US customers on Amazon’s iPhone app. They can find it in the main menu under Programs and Features. An Android version is forthcoming.
Participants select a few interests — like books, food, technology or DIY — upon their first visit. Amazon then uses