When you aim someone and click you want to hit what you see. This is a big problem with lag compo, you are in the present but you see other players in the past.

When you aim someone and click you want to hit what you see. This is a big problem with lag compo, you are in the present but you see other players in the past. In order to avoid this behavior, a common practice is to send what you see, your target, when you shoot.