When you go to view this report you will be asked if you want the report to include all tapes or just one that you select.
Unless you are the root user, when you view this report you will only see information about the jobs you submitted. The root user will see information about all of the jobs on the tape, regardless of who submitted them.
You can view this report if you need to know which files are backed up in each backup session. This might be useful when you need to restore files.