When you transfer funds to your bank or to one of your contacts, you can mark the transaction as a "Business Transaction" or a "Personal Transaction". You can add a note for your own records about the transaction you made.
This feature is providing another level of management to your accounting needs.
These tags are for your records only and will not be shared with the recipient of the transaction.
Go to your Wallet > Transfer - now choose the transaction type and add a note.
You can find the tag in the Transaction Details in Transaction History and also in the Excel Wallet Report. Check out how to export your wallet report here.