The final scene of It Follows may draw David Robert Mitchells horror to an end, but it leaves the story wide open, and that’s why it’s one of the scariest ending scenes of all time. The movie recreates the suspenseful tension of 90s horror movies, without relying on gratuitous violence. Instead, It Follows creates an increased anxiety with its psychological story. A disturbing figure hunts the victims of its sexually transmitted curse, and the uncertainty lies in when and how the next threat will emerge. The ambiguous ending makes it unclear whether the monster has been truly defeated.

https://screenrant.com/it-follows-horror-movie-best-final-scene/