Triggers allow one action (such as entering a secret code, reaching a certain number of points, or completing a set of challenges or other triggers) to trigger another award with a badge and optionally other items (a vendor code, an avatar bundle, a prize, or a certificate).
You can attach a PDF certificate to a Trigger if you have the Trigger Attachment permission in Mission Control. When the customer achieves the necessary criteria to activate the Trigger, they will see a link to the certificate in:
the pop-up that appears for the user when they activate the Trigger
their achievement history (shown in the History tab of their My Profile page)
the Certificates section on their My Profile page