folders help you to:
keep an overview of your objects
share information with other users and external partners
search for certain information and quickly find the information again
Folders are called differently in the following apps:
A folder is called address book in the Address Book app.
A folder is called calendar in the Calendar app.
The following information about folders can also be applied to address books and calendars.
Further information on files and folders in the Drive app can be found in Organizing Files and Drive Folders.
Also see:
Parent topic: Data Organization, Shared Objects, Security