From 785b405184b50dea39ee3ac643e423aa48821e34 Mon Sep 17 00:00:00 2001
From: NewSoupVi <57900059+NewSoupVi@users.noreply.github.com>
Date: Thu, 12 Sep 2024 15:07:50 +0200
Subject: [PATCH] Update world api.md

---
 docs/world api.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/docs/world api.md b/docs/world api.md
index bf09d965f1..9b48b1c32e 100644
--- a/docs/world api.md	
+++ b/docs/world api.md	
@@ -248,7 +248,8 @@ will all have the same ID. Name must not be numeric (must contain at least 1 let
 Other classifications include:
 
 * `filler`: a regular item or trash item
-* `useful`: generally quite useful, but not required for anything logical. Cannot be placed on excluded locations
+* `useful`: item that is especially useful. Cannot be placed on excluded or unreachable locations. When combined with
+another flag like "progression", it means "an especially useful progression item".
 * `trap`: negative impact on the player
 * `skip_balancing`: denotes that an item should not be moved to an earlier sphere for the purpose of balancing (to be
   combined with `progression`; see below)