Short terms to describe this movie:
1. Among Us.
2. Doppelganger.
3. Naruto's skill, wind shadow clone.

Information:
Jump scares: Yes.
Jump scares intensity: Low. (I wasn't even flinched a sec)
Sex scenes: No.
Bloody graphics: Yes (Final Destination level).
Ghost form: Possessed human. (Not a monster/fictional being)
Ghost scary level: Low. (The Nun and Annabelle are scarier to me lol)
Religious: Yes (This is a story about a pastor and his family after all)

Pros:
1. Family-friendly. You can (even are recommended to) watch it with your family, relatives, friends, crush, boy/girlfriend.
2. The atmosphere is really dark. If you are a scaredy-cat like me, I recommend you to watch it in the afternoon.
3. The writer is so brave that the ending turns out to not be bright.
4. Solid. Every second haunts you.
5. Jump scares are there, but without an exploding SFX. So it's safer for your heart.
6. Creepy BGM and shrieking sound make it darker and scarier. Watch it with a subwoofer speaker if you have it.
7. Sung Dong Il + Cho Yi Hyun.

Cons:
1. As always, because it's a Korean movie, plot holes are everywhere. But it's not a big deal because we are focusing on the horror scenes.
2. The characters' fate might not meet your expectation.