diff --git a/website/docs/guides/docs/sidebar/multiple-sidebars.md b/website/docs/guides/docs/sidebar/multiple-sidebars.md
index 9a2029db13..b97e4b5d12 100644
--- a/website/docs/guides/docs/sidebar/multiple-sidebars.md
+++ b/website/docs/guides/docs/sidebar/multiple-sidebars.md
@@ -118,6 +118,8 @@ The pagination label by default is the sidebar label. You can use the front matt
 
 The `ref` type is identical to the [`doc` type](#sidebar-item-doc) in every way, except that it doesn't participate in generating navigation metadata. It only registers itself as a link. When [generating pagination](#generating-pagination) and [displaying sidebar](#sidebar-association), `ref` items are completely ignored.
 
+It is particularly useful where you wish to link to the same document from multiple sidebars. The document only belongs to one sidebar (the one where it's registered as `type: 'doc'` or from an autogenerated directory), but its link will appear in all sidebars that it's registered in.
+
 Consider this example:
 
 ```js title="sidebars.js"