Google Now currently learns a user’s interests and habits by analyzing search requests and scanning emails so it can automatically present helpful info, such as the schedule or results of your favorite sports team or how long it will take to get to work or home.
With the Android M, users will be able to summon Google Now to scan whatever content might be on a mobile device’s screen so it can present pertinent information about the topic of a text, a song, a video clip or an article.
Android M will be compatible with fingerprint scanners so device users can verify their identities by pressing a button instead of entering a passcode.
Google is giving users control of app permissions in the M release. Apps can trigger requests for permissions at runtime, in the right context, and users can choose whether to grant the permission.
Android can now learn which apps you share content to frequently and place that at the top of the list, so if you share photos to the Facebook app a lot, it will be at the top. Direct Share also lets you share content to specific people that you contact you the most, so they are placed directly in the share sheet instead of having to hunt them in the contacts list.
Cut, Copy, Paste
With M, you now get a floating toolbar with clear cut, copy, and paste buttons, with overflow menu for additional options such as search or translate.
There will be undo-redo keyboard keys too.
Adoptable Storage devices
Users can now add an SD card, which will then be adopted by the system to behave like internal memory. The SD Card will be formatted and encrypted and will be seen like internal storage. You can then install apps and other data easily onto the SD cards.
Auto App back-up
Google got rid of the Google Settings app and now all the options are listed inside the main Settings app under an option called Google.
There is now an option to switch to the dark theme. It also only affects the look of the Settings app for now. Other than Light, and Dark, there is an Automatic mode that automatically switches it to dark mode at night.