What is a beneficiary?
A beneficiary is someone you want to receive the money in your super account in the event you pass away. You can read more about how super is handled in the event you pass away on this ATO page here.
You can make either make a binding or non-binding nomination. You can read more about the differences between the beneficiary types here.
To find out how you can apply for a beneficiary with Future Super, please see this page.