This pages gives you more information about Facebook Campaigns.
Facebook Campaign: This Line Item corresponds to an existing Facebook Ad campaign that runs in your Facebook Ad account. By adding it to your Ad360 campaign, you allow Ad360 to get the data and display it in a central place so that you can compare results of Facebook versus over channels. Plus Ad360 can optimize your Facebook campaign so that you generate more sales. You need to have linked an existing Facebook Ad account in your Settings page to run Facebook Campaigns.