Public folders are a feature of Microsoft Exchange used to share information with others within your organization.
For more information on public folders, ref:
http://technet.microsoft.com/en-us/library/jj200758(v=exchg.150).aspx
People Use public folders to:
Post information within the org.
Share Outlook items in a calendar, contact list, or task list.
Share files.
This information is backed up and restored, while we select the public folders .
Regards,
Vishal Shinde
