Cashback is a system that returns an increasing percentage of your money back to your Eco balance after you place orders.
This way, you can use the money that was returned to you when paying for your future parcel shipment services.
The percentage increases with every single order you make (i.e. you get 2% cashback for your third shipment,
3% cashback for your fourth shipment, etc.), and the maximum cashback offered is 10%.
The first order you make is considered a starting point so you don't receive any cashback for it, but you get 1% of your money returned when you place your second order.
Although the cashback percentage returns to zero every month, the money you got back after paying for your orders remain at your Eco balance, and can be used anytime you place new ones.