If you are using Salesforce Lightning, click on the App Launcher and click the PK4Connect tile. You will see the tabs related to PK4Connect on your screen.


 

If you are using Salesforce Classic, you need to click the + button and click on individual tabs such as Campaign, Sent Message, Sent Message Updates to see Campaign, Sent Messages, and Sent Message Update details. Or you can click on customize tabs and add the tabs related to PK4Connect app to the main tabs list.