The sent campaign page shows the data used for your campaign, engagement analytics, feedback and a social URL (if this method has been selected).
Each tab allows for ease of searching and viewing the relevant information.
Edit: Navigate to the edit tab and the three components that were used to send your campaign are still shown. From here you can edit the content, add recipients and activate another delivery method.
Analytics: The analytics tab is comprised of five different tabs components, each showing relevant information for that piece.
Feedback: This shows all feedback that recipients have given
Social: This will provide the social sharing feature as well as the public URL for your own sharing. This tab is only shown if the Social Networks method has been activated.