Here's the link to the section you needed in the training portal: https://dovetailmktg.kartra.com/portal/mgsitlogin/subcategory/90
This section is really only useful if you're running ads in different time zones and want to make sure your Zapier Delays are cutting off and starting at appropriate times in different time zones. This could also be useful if you are running ads for different accounts that are in different time zones.