A preheader is the text following the subject line when an email is preview in desktop and mobile email clients. The preheader is an optional addition to any mailing sent through Delivra. Since the preheader is one of the first three items seen when viewing an email, this text is typically a call to action or other catchy text to call attention to your email message.
You will find the preheader in two places: when creating a new mailing, or in your content file, under the INFO tab. Just type or paste in and be sure to save.