Applying day parting is an effective way to optimize campaign based on the past campaign experience, Advertisers know with their past experiences specific time in day, usually evening, morning etc or specific days in week when campaigns usually convert. Some campaigns tend to do week on weekdays and some on weekends, similarly some campaigns do well in day time, morning some in night and so on..
Advertisers can target their campaigns to users and allow the ads to show up time frame which is best converting for them, this is called Day Parting (when you server ads on selected days), and Can also target specific time frame in those days like 1 AM - 2 AM, then 4 AM - 5 AM etc..
This is also known as Ad scheduling.
How do i implement this in my campaign?