I want to withdraw Zcash (ZEC) from Kraken and deposit and Binance. At Binance I receive a deposit address, so only 1 code. At Kraken I have 2 fields that I need (obligatory) to fill in. field 1 is Zcash address. This is what I got from Binance. Field 2 is description, what do I need to fill in there?

Explanation for field 2 is: Unique description used to identify this address.
But still I dont understand what this exactly means?