Issue #2222925: Note the features this settings is made for in

description text

googleanalytics.admin.inc

@@ -253,7 +253,7 @@ function googleanalytics_admin_settings_form($form_state) {
   $form['tracking']['search_and_advertising']['googleanalytics_trackdoubleclick'] = array(
     '#type' => 'checkbox',
     '#title' => t('Track DoubleClick data'),
-    '#description' => t('If checked, the alternative Google <a href="@doubleclick">DoubleClick data tracking</a> is used to enable AdWords remarketing features. If you choose this option you will need to <a href="@privacy">update your privacy policy</a>.', array('@doubleclick' => url('http://support.google.com/analytics/bin/answer.py', array('query' => array('answer' => '2444872'))), '@privacy' => url('http://support.google.com/analytics/bin/answer.py', array('query' => array('answer' => '2636405'))))),
+    '#description' => t('If checked, the alternative Google <a href="@doubleclick">DoubleClick data tracking</a> is used to enable AdWords remarketing features. This is required for Remarketing, Demographics and Interests reporting and GDN Impression Reporting features. If you choose this option you will need to <a href="@privacy">update your privacy policy</a>.', array('@doubleclick' => url('http://support.google.com/analytics/bin/answer.py', array('query' => array('answer' => '2444872'))), '@privacy' => url('http://support.google.com/analytics/bin/answer.py', array('query' => array('answer' => '2636405'))))),
     '#default_value' => variable_get('googleanalytics_trackdoubleclick', FALSE),
   ); */