A campaign can be an email.  You have a template with the information that you want to distribute and it is then sent to a list of recipients.

With the “Campaigns” page you can send out the templates you have created through e-mail to make announcements, send out news, or send out information to people on your recipient lists. With the campaigns page, you will be able to see your campaign’s name, category name, the status of your campaign, the date it was sent, what recipient list you sent the campaign to and the template design you chose, all in a neatly organized grid. If the status of your campaign is in progress you can make changes to your campaign before the progress is complete. When a campaign has been emailed, you can archive that campaign. This will allow your audience to view historical campaigns at any time.