android 6.0 "MARSHMELLOW" latest version of android family.

Android Marshmallow is visually similar to its predecessor, Lollipop, in many ways. Google’s Material Design language is now more pervasive than ever before and the main areas of the UI – settings, notifications shade and navigation – remain the same. But Marshmallow does have some differences in appearance and new features.
Lock screen
The Marshmallow lock screen is almost identical to Lollipop's, complete with expandable notifications and app shortcuts. But where Lollipop had shortcuts in the bottom corners that too you to the camera and dialer, Marshmallow replaces the dialer shortcut with one to Google’s voice search. This small update is the first clue as to just how integral voice commands are to Marshmallow.
Home screen

The same voice command functionality appears on the home screen via Google’s dedicated search bar, complete with the colorful, post-Alphabet Google logo. The home screen itself is essentially the same as it was in Lollipop (the changes to Google’s search bar and app icons have rolled out to all devices via updates).Google Now, assuming you have signed up for it, returns to its dedicated position to the immediate left of the default home screen. This area has also been updated but again, it is not a Marshmallow exclusive feature. Google Now on Tap (more on this later) is now launched by a long press on the home button in the navigation bar.

You have a few options for launching apps: from voice commands, app icons, the 'recent apps' multitasking cards or the new-look app drawer. You can also jump straight into the app drawer search bar by long-pressing the app drawer icon. This shortcut will also launch your keyboard, just as it did in Lollipop.

App drawer

The app drawer in Marshmallow went through a couple of changes during the developer preview process and appears in the final version as a vertical scrolling list as opposed to the paginated horizontal list from Lollipop. You can scroll through the list or use a new scrubber bar on the right to jump to a particular letter of the alphabet.

An endless vertical list means it's easy to swipe right to the end of your app list – certainly moreso than swiping through multiple cards in Lollipop. Predictive apps, based on the time of day, frequency and so on, appear in a special area at the top of the app drawer and you also have the added bonus of the dedicated app search bar that's accessible via the keyboard or voice, as well as the scrubber bar.

Notifications and Quick Settings

Marshmallow has a two-part notifications/Quick Settings area. A single swipe down from the top of the home screen will pull down the notifications shade, where your expandable notifications live. A second swipe down on this screen, or a two-finger swipe down from the home screen, will take you to the Quick Settings panel.

Google Now on Tap

Google Now on Tap is perhaps the biggest deal of all in Android Marshmallow. Google Now changed the game back in KitKat by offering time and context-sensitive notifications, information and reminders. Google Now on Tap basically shortcuts the need to search for additional contextual information and delivers it at any turn. Long-pressing the home button now activates Google Now on Tap, replacing the old gesture for Google Now from any screen.

Doze

Doze is, after Google Now on Tap, perhaps the biggest thing in Marshmallow. Doze is an intelligent battery management feature that recognizes when your device is not is use, like when it has been lying on a bedside table for a while, and enters hibernation.

It’s more complicated than that, of course, but the battery savings are phenomenal. Where other devices lose an average of 15-25 percent of battery life overnight, Marshmallow can take that down to 3-5 percent, taking your standby time to nearly two weeks in the process.

Type-C and reverse charging

Marshmallow also supports the new standard, USB Type-C. Type-C cables are reversible – so you won’t have to worry about fumbling around with your charging cable in the dark – and they also support faster data transfer and charging speeds.

Not many devices have USB Type-C ports yet, and not all are shipping with true Type-C cables and adapters (many are simply reconfigured USB 2.0 cables). But Marshmallow is future-proofing itself by including Type-C support and the new USB Power Delivery specification, meaning Marshmallow devices will also be able to reverse-charge other devices.

MicroSD support – Adaptable Storage Devices

With the arrival of Marshmallow we're finally looking at full-fledged support for microSD expansion in Android devices. Under Marshmallow, microSD cards can be formatted to a specific device – meaning they will be unusable elsewhere – and treated as another part of internal storage by the Android system.

Fingerprint API

Android Marshmallow introduces system-level fingerprint support via the new fingerprint API. Both new Nexus devices have a fingerprint scanner. The rollout of Android Pay and other touchless payment systems that rely on fingerprint scanners for authentication can now be handled by Android itself rather than a manufacturer add-on. Fortunately, Google has set minimum standards for scanner accuracy in order to pass its device certification.

Smart Lock

 Smart Lock on Marshmallow provides options for unlocking your device or keeping your device unlocked depending on various intuitive scenarios. Smart Lock is found in the security settings and requires the use of some form of lock screen security.

Delete screenshots from notifications shade

In previous versions of Android, when you took a screenshot the only option you had straight from the notifications preview was to share it. In Marshmallow, you can now delete it too. This may not seem like a big deal, but if, like me, you take about a hundred screenshots a day, it's hugely convenient because you no longer have to go into your gallery to delete a poorly timed or duplicate screenshot.

Direct share

Direct Share is a new feature. It doesn't work everywhere yet, but the idea is that when you hit the share picker, instead of just seeing a list of apps, you'll see some contacts at the top as well. Theoretically you can instantly share the content with that person rather than head to an app in which you then need to choose a contact.

" Marshmallow makes Android easier to use than ever before. At the same time, Android 6.0 adds a layer of advanced features for those that want to make use of them. There's also a lot of tidying up and straightening out of Lollipop's kinks.Marshmallow makes more sense than Lollipop and improves on its predecessor in terms of performance, battery life and feature set. Marshmallow isn't perfect, but its beauty is more than skin deep. There's a lot beneath the surface for those that go looking."