What does an invoice with the status "Confirming" mean?

The “Confirming” status of the invoice indicates that your transaction has been detected, but that we are still waiting for the cryptocurrency network to confirm the payment. Once you see this status, there is nothing else you need to do. Transaction confirmation times depend on the fee that was attached to the transaction and the load of the cryptocurrency network. Typically, transactions are confirmed within an hour, but they can take up to several hours or even days if the fee attached is too small.