The memory manager in Android Marshmallow shows you the memory usage by apps. You can view the Average memory usage by all apps combined and also memory usage by individual apps. If you find that an app is overusing the memory, you can force stop it from the Memory section itself.
Backup feature in Android has been made automatic in Android Marhsmallow. Android will now backup data periodically to a private folder in Google Drive (Backup space used does not count towards your Google Drive's storage quota).
One thing that Android always lacked was an inbuilt file manager. Android Marshmallow is the first Android version to have a built-in filemanager. It provides basic functionality like browsing, sharing and deleting. The built-in file manager is available only when the card is formatted as internal storage.
In the previous versions of Android, not all apps could be moved to the SD card. Some apps required internal storage to function. Marhsmallow gets around this problem by letting you format SD card as internal storage.
The app drawer in Android Marshmallow has undergone a few changes to make it more user friendly.
Doze mode is a new battery saving feature launched in Android Marshmallow.
In Android Marshmallow, 'Google Now' personal assistant can work from within an app and return contextually relevant Google Now cards. When using any app like email, a web browser or youtube, press down the home button to launch Google Now. Then speak to Google Now for any assistance that you may require. Note: You need WiFi or data connection for Google Now to work.
In Lollipop and earlier versions of Android, you had to accept all the permissions that an Android app asks for. Even if you did not require some of the features, you could not revoke permissions that those features required. In Android Marshmallow, you can granularly grant or revoke permissions even after installing the app.
Sometimes you may want to save a webpage and access it offline. Chrome browser's 'Save as PDF' feature helps you save the webpage as a PDF file that you can access offline.
If there is a website that you visit regularly, you can add a website shortcut to Android home screen. Just tap on the shortcut whenever you want to open that website. You can add a shortcut using either the Chrome browser or the Firefox browser for Android.