How to find out what a Customer Timer job's function is Or what the timer job does when started

So I have inherited a SharePoint farm to manage. When I look at the time jobs I see what looks like a custom Timer job called:

"SharePoint PowerShell Schedule Task". This job does not have a description. So I try to research what it does through powershell with the command

$job = Get-SPTimerJob | Where {$_.Title -Match "SharePoint PowerShell*"}

However looking at the properties I do not see what the timer job does.

I have researched online and found many pages of how to create a custom timer job and how to stop and start one, but I am having a hard time finding any reference that describe how to find out what a custom time job does.

Thanks

pfcjt@hotmail.com