parameters you copy over to the target parameters you never learn the target parameters you simply copy them after each step now you don't copy them outright what you do is you do an exponential moving average so the target parameters are always going to be sort of a lagging average of your online parameters and that idea comes from the momentum contrast principle where the reasoning sort of behind it is that you need a kind of a stable you kind of need a stable representation as a target but I think it hasn't been fully explored or