Labels are short, easy-to-remember words for long, complicated wallet addresses. For example, it is alot easier to remember the label "homewallet" than it is to remember the wallet address "DFi9yMNjBqq1rdjDmJwnkncXYxj72yU".
When you create an address using your Wallet, we create a random wallet address for you.
Your White Label Cryptocurrency Exchange - Exchangebox.io
If you wish to label this wallet address, you can specify this an alpha-numeric string in the input field on the Create Address dialog.