On the Basic Info step of the email blast creation, provide summary information about your email.
Mass Activity Title: This field allows you to apply a title to your mass email activity. This title is then listed on the Mass Activity Manager screen when you go to Activities > View/Search Mass Activities. The recipient of the email will not see this title.
Description: This is where you can add/save a description about the email blast (e.g. a dinner event invite, a scheduled fundraiser, etc.). The recipient of the email will not see this description.
Activity Campaign: This is where you can (optionally) link this Mass Email to any existing Activity Campaign in your database. Linking the Mass Email to an activity campaign allows the email recipient to unsubscribe from any email blasts tied to that specific activity campaign. The email recipients also have the option to unsubscribe from all emails.