The event description is a term used to describe the type of event. You can select an appropriate term from the drop down menu. Contentware uses this term extensively throughout the campaign promotions. Think of this as a find/replace feature. So the base content might be something like this:
What are the best practices for email and social media promotions? Find out at our upcoming {INSERT DESCRIPTION HERE}.
Depending on the term selected, the final content would look like this:
What are the best practices for email and social media promotions? Find out at our upcoming webinar.
What are the best practices for email and social media promotions? Find out at our upcoming online event.