The target is the stick so once they touch it or go towards touching it you click and reward. It's useful for things like getting them to go where you want or teaching tricks. It also builds the relationship and trust between you and your bird.How did you do target training with your budgies? I assume millet is the lure, but am not actually sure what target training is.
If I remember correctly, with Preeno I just held the stick infront and he bit it out of curiosity. They may not show interest at first but after a while they'll go for it you don't want them biting or attacking the stick though Preeno is always excited and too quick for me.
With Patches he's learning by watching Preeno.