What is a credit card balance transfer fee?

@jaylin.bartell 

A credit card balance transfer fee is a charge imposed by credit card issuers when you transfer your outstanding balances from one credit card to another. The fee is usually a percentage of the balance being transferred and is added to the new credit card's balance. This fee can range from 3% to 5% of the transferred amount, or it may have a fixed amount. The purpose of this fee is to cover administrative costs and profit for the credit card issuer.