Cron jobs allow you to automate certain commands or scripts on your site.
To start using Cron Jobs, go to the “cPanel>Advanced>Cron Jobs”. 
Firstly, you need to add a new cron job. Choose the right settings and press "Add New Cron Job" button. 
Now you can check your current cron jobs. Below you can see an example.

You can edit or delete your current cron job if you want to.