What Makes A Horror Story? What in your opinion makes a horror story good and thrilling...lengthy answers please

Find your audience and figure out what scares them the most. For me its not some crazy animal after me. Its a human hunting me. If you write a horror story make sure to add detail about everything. Especially feelings, scenery etc. Some suspense to keep people on the edge but not a lot so the climax is just right. If its really good it will keep people coming back for more.

suspense good scenery detail and these characters the jock, nerd, person who everyone hates, the good girl, the bad girl *cough* hormones*cough*,and of course the killer('s).