In the final stage of creating a campaign, you must decide if you would like the campaign to be sent immediately, or have it scheduled for a specific time in the future. If the schedule option is selected, you will need to specify the delivery time by providing the date , time , and time zone you wish to send in.
If you are scheduling a large campaign that requires payment, your credit card will not be charged until the campaign is actually delivered . This means that if you cancel the scheduled campaign before delivery, you will not be charged.