This is a PPWIZARD command line switch. You can set up your own default switches in the "PPWIZARD_OPTIONS" environment variable.
This option can be used to pause execution for a period of time after PPWIZARD completes processing normally (no trap etc). Used with the "/DependsOn" switch could be used in place of a CRON step to poll for data file changes.
If you like the sound of this be sure to also check out the "/Template" switch.