The ad schedule is where you set the days and hours the ads will run. A lot of the timing depends on what you're selling. So you'll need to test out a few strategies here.
For example, when looking for products during weekdays, many people browse while at work, but buy when they come home. So block 9 am to 6 pm. Also block 10 pm to 6 am. So that means running product ads from 6-9 am, then pause until 6-10 pm on weekdays, but keep the ads running all day on weekends.
Affiliate programs for job boards, resume services and anything work related are the opposite. People look for work, post resumes, look for employees, etc, all day long on weekdays, but not on weekends.
CPA affiliate programs like loan applications, or lead generation items, that do not require a credit card purchase can be effective at any time of day. But block the 12 am to 5 am people, because they are least likely to convert.
That said however, late evening can be lucrative when promoting infomercial type products. These can be 1 minute long commercials for products like insurance and sunglasses, or 30 minute shows featuring frying pans and blenders.
Most of these infomercial products have affiliate programs. So if you see the ads day after day, find the product and test running your ads, but only from 10 pm to 1 am. Also test from 7 am to 10 am the next morning.
If you don’t get out of the box you’ve been raised in, you won’t understand how much bigger the world is.