diff --git a/google_analytics.module b/google_analytics.module
index addd4ec..0d7f87a 100644
--- a/google_analytics.module
+++ b/google_analytics.module
@@ -324,6 +324,26 @@ function google_analytics_page_attachments(array &$page) {
       $script .= 'ga("set", "anonymizeIp", true);';
     }
 
+    // allow other modules to specify a content grouping for this page
+    $groupNames = [
+      'contentGroup1' => NULL,
+      'contentGroup2' => NULL,
+      'contentGroup3' => NULL,
+      'contentGroup4' => NULL,
+      'contentGroup5' => NULL,
+    ];
+
+    $node = $request->attributes->get('node');
+    \Drupal::moduleHandler()->alter('google_analytics_content_group', $groupNames, $node);
+
+    if ($groupNames != NULL && is_array($groupNames)) {
+      foreach ($groupNames as $contentGroup => $groupName) {
+        if ($contentGroup != NULL && !empty($contentGroup) && $groupName != NULL && !empty($groupName)) {
+          $script .= "ga('set', '{$contentGroup}', '{$groupName}');";
+        }
+      }
+    }
+
     if (!empty($custom_var)) {
       $script .= $custom_var;
     }