I think trying to estimate an opponent’s range is a given, and it gets continually refined the further a hand goes. But I think that taking it next level is to take a stab at what the opponent thinks you have based on your betting patterns will help even more (and this is based on the interaction between your betting patterns and your opponent). I think this is what people mean when they ask you what you are representing with your action. Once you figure that out, your bluffs will be so much more believable because it needs to fit the range you are representing.