Total earnings - these are your all time earnings from this node before settlement and withdrawal fees.
Unsettled earnings - These are confirmed earnings which are not settled to your Balance yet. Settlement to Balance is done either automatically when 5 MYST is reached or manually when SETTLE button is clicked.
Applicable settlement fees -Network settlement fee: 20% (fixed fee).Blockchain transaction fees: dynamic depending on blockchain conditions and congestion.
Balance - these are your earnings after settlement fees. This balance can be withdrawn to your external wallet at any time.
Example - Let's say your Unsettled earnings reached 5 MYST and are being settled to Balance. In this case 1 MYST will be deducted as 20% network settlement fee plus blockchain fees which are dynamic.