When you create a campaign, your campaign is saved and you can review the details of these past campaigns that will provide you with insights like when the campaign was initiated, to whom it was addressed to as well as how successful the delivery of the messages was for the campaign.
This provides you with a snapshot view of all completed campaigns and display how successful the delivery for the campaign was.
This report will show you how many messages was sent and how many messages were successfully delivered. Clicking on the View button will show the individual messages that was sent together with the timestamp of when the message was delivered.