Calories in/out, Activities, etc

When browsing logs, I'm seeing some with "calories in:___ calories out: ____ calories burned through lifestyle ____, activities ____"

Is this from the nutrition portion of our logs and it looking at our training for the day? Or is there something else?

Say I input my nutrition, is there something in the system that tells it what I did and how much I burned or is that a manual input?

I guess I'm just not 100% sure on where or how I can go to take advantage of this