title: Doze, different between Marshmallow and Nougat
body: <p>Currently i reading in official google doc news about Android 7.0<br>
  I can not understand a few things.
  They wrote Doze improve battery life by turn off network and CPU when user block the screen.
  But how this works ?</p>
  
  <p>1.I have Marshmallow in my device, and when my phone is blocked, i still get notifications from app with network (e.g. Messenger).</p>
  
  <p>2.Second thing they wrote Nougat have improved this more by again CPU and network. So what is exacly differet ?</p>