Scheduled work on your server.
WHAT IT DOES
Runs a command at a time you specify, repeatedly, without anyone being present.
WHAT IT IS USED FOR
Application scheduled tasks Backups Sending queued email Cleaning up temporary data Importing or exporting data Certificate renewal
WHY YOU NEED TO KNOW ABOUT IT
Many applications depend on scheduled tasks and do not tell you clearly.
When they stop running, things silently fail.
WHERE TO SET ONE UP
cPanel, Cron Jobs.
WHAT YOU NEED
A command to run and a schedule.
WHAT CAN GO WRONG
A job that never runs A job that runs too often A job that fails silently Output filling your disk
All of those are covered here.
WHY IT MATTERS ON OUR SERVERS PARTICULARLY
HTTP wp-cron is blocked fleet-wide. WordPress needs a real cron job.