From my experience with retargeting it drives amazing lift in conversions. A lot of platforms allow you to do this dynamic ad placing where you show the recentl

From my experience with retargeting it drives amazing lift in conversions. A lot of platforms allow you to do this dynamic ad placing where you show the recently added item in a cart, but not purchased. Also, let's not forget that Amazon is obsessed with testing, I am sure they have troves of it to back up everything they are doing.