Shot calling is one of those undervalued, often unknown, or—at best—misunderstood, skills that make up the meta-skill of shooting that we really need to condition ourselves to emphasize more often in our training and practice. Start today. It will make you more dangerous.
If you don’t know what calling your shot is, or how to do it? Go take a shooting course. If that training course doesn’t cover it, go find a course with an instructor that actually knows what he is talking about.