Did someone write this to you, deer? It's not very informative, is it? :(
It means,Not sure what you need. The modal 'will' + passive is used for predictions, decisions, and a number of other uses, often related to future events.
I am not sure how to help you. The word "will" is called a modal. In the passive voice, for example
Active: Sam will eat cake.
Passive: Cake will have been eaten by Sam.
it is used to mean many things, such as predictions, decisions, and many other things that happen in the future.
What was your original question, deer? Was it about "will". Please ask us here at usingenglish.com. :D