A campaign is basically a name that other content is assigned to. This allows for content to be grouped together based on some common characteristic. A campaign may have a range of content assigned to it. The content can be Offers, Push Notifications, Banner Ads and Loyalty Cards. The advantage of organising the content by campaigns is that it allows you to have a systemised view of the reporting.
Creating a Campaign
On the top right of the screen is the "create new" drop down box. From here you can create a new campaign.