Cron Job ? What is it ?

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Add Cron Job
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Title : RPG: Delete Lottery
Day of the Week : *
Day of the Month : *
Hour : 0
Minute : 0
Log Entries : Optional
Filename : ./includes/cron/rpg_endlottery.php

I don't know what I shoud do with them ?
Please ,please tell me
I am new member !
thanks

[Revan]

AdminCP -> Scheduled Tasks -> Add New Scheduled Task
As for what the cron job is, it picks winners from lotteries you have created.

[xbaby]

Thanks , goo......d ...goood revan
U are very kind !!!!