Cron Job is a command in Unix and Unix-like operating systems. It is used to schedule commands to be executed periodically. CPanel has a nice interface to allows you to set up cron jobs. You can have a script run at all kinds of intervals from every minute to once a year.
You will need to make sure the file has executable permissions to run. We also recommend not running a file every minute on a shared server or you may go over your resource limits.