For the zoombie application a job or a task is a zoombie plugin wich can be triggered to run at scheduled time, there are 4 way to schedule zoombie jobs:
If your webserver allows cron jobs there is a Joomla Platform application that need to be scheduled from a cron job.The zoombie command line application when running check if is time for some zoombies plugin to be triggered
If you have Command Line Interface enabled there is a Joomla Platform application that can be scheduled from a Terminal .The zoombie command line application when running check if is time for some zoombies plugin to be triggered
to operate on hosts that do not offer a job scheduler such as cron or a shell account, the zoombie system plugin when running check if is time for some zoombies plugin to be triggered. Consider the setscronjob.com free service.
When a visitor views the website, the zoombie system plugin is triggerd
Zoombie is released with some ready to run task
Automatically run db or tables backup at scheduled time
Automatically run site or folder backup at scheduled time
Automatically run site or folder checksum at scheduled time
Automatically run site or folder AntiMalware script scan at scheduled time
Automatically clean expired cache at scheduled time
Automatically populate Finder tables at scheduled time
Automatically Archive/publish/unpublish Article at scheduled time
Automatically run antispam check at scheduled time
It took a while to set up Zoombie and its control panel due to poor documentation. If they can make the documentation or support using their own site better, I would rate this an excellent tool.