The Timeline Tab in the Candidate's profile (available as Add on) shows the main actions taken from the candidate or on the candidate profile by company users, such as new application, updating profile, adding new comments, etc...
The left column will show the actions performed by company users on the candidate's profile, while the right column will show the actions performed by the candidate himself.
Using the "Filters" icon on the right in the Timeline page it is possible to filter the saved actions on the candidate's profile for Type of user who took the action, type of action, company user who took the action, vacancy related to the ation and date range in which the actions were taken.