John Rawls described this veil as a hypothetical state in which every individual has no idea (or is veiled in ignorance) of the privileges and weaknesses they would have in society.
They don’t know about their own talents, their own disadvantages, their financial state, or even their race, gender, or religion. In other words, all biases have been eliminated.
Rawls then asks us to consider how we would enjoy, or fit into such a society in which we have no prior knowledge of our own standing. In such a condition only safe principle will be maximum standards of minimum liberties.
Thus through the veil of ignorance, Rawls tried to give a method through which just and fair laws/societies can be made.