Time zones change the best delivery hours
The contiguous United States spans four main time zones, and Canada spans six. A campaign scheduled by one clock can deliver visits at night in another region. Night visits still count in the report, but fewer of them reach a sales team that is online.
For example, a campaign that starts at 9:00 in New York starts at 6:00 in Los Angeles. A B2B page that offers a live call then receives West Coast visitors before anyone can answer.
Your delivery schedule can follow the visitor's local time, with separate hours for the East and West Coasts where volume allows. This works because visits arrive during the visitor's working day, and your team can respond while the interest is fresh.