Ripple addresses are composed of a string of 34 characters.
With Ripple, a "Tag" is required to associate your transaction with your account. On Bitfinex, a tag is provided for each of your wallet deposit addresses.
If you are depositing XRP, you can find our Ripple address and your tags on the Bitfinex Ripple deposit page.
If you are withdrawing XRP to a merchant or another exchange where all XRP funds deposit to the same address, you will copy the tag they provide you and paste it into your “Recipient Tag” field on the Bitfinex Ripple withdraw page.