ECO Drive Report, any comments on how this works?

I see the ECO Drive Report after pushing the power button to turn off the car, and I understand if you push the OK/scroll it will display.

So I took some pictures of it, but it's not clear if this means regenerated range just for that drive or what. I understand the 5 white bars are supposed to be 5 previous drives with blue being the current drive. I believe this is a Leaf feature, so maybe someone understand it better.