The Activity Log is a great way to view the timeline of activity for each application. You will see the timestamp of each activity, and the name of the user who made it beneath each activity!
You can view the Activity Log by clicking on any candidate card. On the pop up that appears on the right side of the page you will see the Activity Tab as the first tab.
Reminder: if the candidate has applied to multiple of your jobs you will be able to click the arrow on the right corner to toggle between the different applications. There will be different Activity Logs for each application.