diff --git a/which-key.el b/which-key.el
index a1bab6ed629..f992a5435d8 100644
--- a/which-key.el
+++ b/which-key.el
@@ -23,8 +23,18 @@
 
 ;;; Commentary:
 
-;;  This is a rewrite of guide-key https://github.com/kai2nenobu/guide-key. See
-;;  https://github.com/justbur/emacs-which-key for more information.
+;; which-key is a minor mode for Emacs that displays the key bindings following
+;; your currently entered incomplete command (a prefix) in a popup. For example,
+;; after enabling the minor mode if you enter C-x and wait for the default of 1
+;; second the minibuffer will expand with all of the available key bindings that
+;; follow C-x (or as many as space allows given your settings). This includes
+;; prefixes like C-x 8 which are shown in a different face. Screenshots of what
+;; the popup will look like along with information about additional features can
+;; be found at https://github.com/justbur/emacs-which-key.
+;;
+;; which-key started as a rewrite of guide-key
+;; (https://github.com/kai2nenobu/guide-key), but the feature sets have since
+;; diverged.
 
 ;;; Code: