Each job can have unlimited stages and each stage can have unlimited tasks.
When you run a job, it will run one stage at a time (from left to right). It will not move onto the next stage until all tasks inside a stage are complete.
If a task fails and you have more stages after the current stage you will be asked if you want to continue or stop the job.
There are currently four task types.
Recover task - Recover one or more systems from a backup.
Reboot task - Reboot your system(s) with a given boot order & delay. (use after a recovery task).
Script task - Run a script and report the outcome (use after a reboot task).
Manual task - Tell the job you need to perform a manual step here. The job will not continue until this is marked as complete.