Jared Spool looks at a really simple, yet incredibly powerful innovation by Amazon which he argues has given them the competitive edge over other retailers.
The user-generated content behind the seemingly innocuous question "Was this review helpful to you?" is what it's all about.
I found this piece really inspiring. Getting the little things right and focusing on the user sometimes pay off in a really big way.
The magic behind Amazon's 2.7 billion dollar question - article by Jared Spool