Essentially we make the following distinctions between bookings when displaying your revenue:
booking date (i.e. when you receive a booking)
event/service date (i.e. when you deliver the service or organise the event the customer has already paid for)
Why two different ways to summarize one and the same thing?
The graph in your Dashboard visualises the total booking volume each day. This way vouchers are displayed twice, once as the revenue from the purchase of the voucher itself and once as the revenue from the appointment that the voucher was redeemed for. If we were to record these sales only once the day the voucher was purchased, orders that were fully paid for with a voucher would be listed with 0 € revenue. (The same would apply if you grant a 100% discount to a customer, essentially meaning a free experience. This could be quite misleading, which is why we chose such logic.)
While we're on it already, have you already checked out our must-have checklist for more online sales?