diff --git a/app/views/posts/new_help.html.erb b/app/views/posts/new_help.html.erb
index ddafe23946d9fafd416158022d182474c7a3f897..e920f3990e3dc88a8923e35fce6ab80f14db2adc 100644
--- a/app/views/posts/new_help.html.erb
+++ b/app/views/posts/new_help.html.erb
@@ -26,6 +26,7 @@
   </div>
   <div class="form-group">
     <%= f.label :doc_slug, 'URL slug', class: "form-element" %>
+    <span class="form-caption">In a URL of "https://yoursite.codidact.com/help/topic", the "topic" is the slug.</span>
     <%= f.text_field :doc_slug, class: 'form-element' %>
   </div>
   <div class="form-group">