If you’ve ever had someone follow you in their car to a destination that you know and they do not, you’ve had experience with what editors call “transitions.”
As you drive to the location and your friend follows in their car, you need to put on your turn signals a bit earlier than you ordinarily would.
You need to change lanes more slowly.
You need to check in the rearview mirror to make sure that the person is still following you.
When you write, your readers don’t know where you are taking them. So you need to constantly make sure they are following you. How?