Android Marshmallow

Android 6.0 "Marshmallow" is a version of the Android mobile operating system. First unveiled in May 2015 at Google I/O under the codename "Android 'M", it was officially released in October 2015.

Features
Marshmallow introduces new power management schemes known as "Doze" and "App Standby"; when running on battery power, a device will enter a low-power state if it is inactive and not being physically handled. In this state, network connectivity and background processing is restricted, and only "high-priority" notifications are processed.
Android Marshmallow also provides native support for fingerprint recognition on supported devices via a standard API, allowing third-party applications to implement fingerprint-based authentication. Fingerprints can be used for unlocking devices and authenticating Play Store and Android Pay purchases. Android Marshmallow supports USB Type-C, including the ability to instruct devices to charge another device over USB. Marshmallow also introduces "verified links" that can be configured to open directly in their specified application without further user prompts.