What is Cron ?

Cron is a program that needs to be installed on the server to use the feature. Cron is a job control program mainly developed for UNIX or UNIX like operating systems including Linux, BSD, Mac OS X . Cron job is automatically set work via scripting which will run at a specified time.

Cron is not necessarily only for UNIX OS, there is Cron for Windows too.

Read more: Cron and Cron Job : Do Works Without Shell