It balances character description and setting.
You are Essun. If you switch points of view in the same story, you have to be careful not to confuse or disorient your reader. Squinting toward the sky, he had seen the sleek jet, almost a blur at its high speed, go past, and a second later heard the blast of sound that followed.
Ignoring all the laws of magic Alanna had been taught, the picture grew and spread. Frightened was the way he had felt a year ago when an unidentified aircraft had overflown the community twice.
She doesn't know what's happening two miles away.
Like a shiny, hard corn kernel or a riverbed fossil. Maybe she fears it. Of course I went with Mr. Now imagine you receive a printout describing what the husband sees and hears at every moment.