Rules tell a folder which items are to be assigned to the folder. For example, a rule can tell a folder to assign all items with the word "urgent" somewhere in the document, or all items marked "high priority".
Rules can be very simple or very sophisticated to work with a very specific set of items. For instance, a rule could be set up to assign only those items that have been marked "high priority", contain the word "urgent" in the document text, and have a due date that has past.
