More & more companies are now adopting the newest version of Android at-least for their flagship devices. Samsung has already released Android Marshmallow updates in India & some other countries also.
Now the Marshmallow update has been made available for the Samsung Galaxy Note 5 & S6 Edge + on Verizon USA. The update comes in stages so you need to be patent in order to your device to receive the Marshmallow update. In order to download the latest update just go to press Menu > Settings > About Device > Software Update > Update.
The update brings some basic Android Marshmallow changes to the phone as well as the system. Some very common additions are Doze mode for battery saving, Google Now on tap, App permissions etc.