The following are the features that the latest OS offers:
1. Doze mode
2. App standby
3. Expandable storage
4. Do not disturb
5. Now on tap
6. Direct share and more

Things to keep in mind while updating Marshmallow on your smartphone:
1. Make sure that your smartphone battery is atleast 50 percent charged
2. The phone must be connected to the Wi-Fi network.

The update is, of course, tweaked for Moto users. For example, since Marshmallow has the 'Do not disturb' setting and data backup,Motorola has removed the 'Moto Assist' and 'Moto Migrate' features from the phone. They're also retiring the Google Chrome extension from Motorola connect.