>>714115071It's just knowledge about the game, an understanding of how it's played, what your role is in a given match, what your enemies are doing (or should be doing) before you see them, where you should be positioning, what's your target priority, what heroes you should be playing to counter their line-up.
It's mostly just something you should pick up naturally over time by paying attention and learning as you play. I don't want to say it's definitely the case, but it seems to be an IQ issue for people that don't learn it.