We can say DLP is pure policy driven the product. If you can't define policy or which data you want to protect then better you have to learn it first.
Use: No user can send Emails to Third party domains defined in policy.
Exception: Allowed user can Send Emails to external domains.
Use: Monitors Each and Every Documents, Images, TextFiles upload.
Exception: User can upload documents to sites allowed by Administrator.
Use: This policy allows a user to send emails to outside networks with the approval of the respective manager, and the manager will be notified by Email wherever incident is generated for this particular users.
Use: Group of people who have all the Rights. They are in exception list for rest of policies.
Use: Monitors each any every file transfer to USB devices and generate incidents.
E.g. Documents, Images, etc.
Exceptions: Allowed users can be in exceptions.
For more download the attachment... :) Thanks.