diff --git a/doc/org-roam.org b/doc/org-roam.org
index 8baf10a..e84a7bc 100644
--- a/doc/org-roam.org
+++ b/doc/org-roam.org
@@ -855,7 +855,16 @@ completions.
   the scenario ~this is a sent|~, calling ~completion-at-point~ will show
   completions for titles that begin with "sent".
 
-** TODO Tag Completion
+** Tag Completion
+
+Org-roam facilitates the insertion of existing tags via ~completion-at-point~.
+
+That is, suppose you have notes with tags "foo", and "bar". Now, in a note, if
+you're on a line beginning with ~#+roam_tags:~, completions for these will
+appear as-you-type if they match.
+
+This functionality is implemented in ~org-roam-complete-tags-at-point~.
+
 * Navigating Around
 ** Index File
 
diff --git a/doc/org-roam.texi b/doc/org-roam.texi
index 291a6d5..4a10d58 100644
--- a/doc/org-roam.texi
+++ b/doc/org-roam.texi
@@ -1222,7 +1222,15 @@ completions for titles that begin with ``sent''.
 @end defopt
 
 @node Tag Completion
-@section @strong{TODO} Tag Completion
+@section Tag Completion
+
+Org-roam facilitates the insertion of existing tags via @code{completion-at-point}.
+
+That is, suppose you have notes with tags ``foo'', and ``bar''. Now, in a note, if
+you're on a line beginning with @code{#+roam_tags:}, completions for these will
+appear as-you-type if they match.
+
+This functionality is implemented in @code{org-roam-complete-tags-at-point}.
 
 @node Navigating Around
 @chapter Navigating Around