diff --git a/core/modules/entity/entity.menu_links.yml b/core/modules/entity/entity.menu_links.yml
index 66c67c6..033adb6 100644
--- a/core/modules/entity/entity.menu_links.yml
+++ b/core/modules/entity/entity.menu_links.yml
@@ -1,15 +1,15 @@
 entity.display_mode:
   title: 'Display modes'
-  description: 'Configure what displays are available for your content and forms.'
+  description: 'Configure display modes, which include view modes (different ways to view entities) and form modes (different ways to edit entities).'
   route_name: entity.display_mode
   parent: system.admin_structure
 entity.view_mode_list:
   title: 'View modes'
-  description: 'Manage custom view modes.'
+  description: 'Configure view modes to display content differently for different situations; for example, Full content or Teaser.'
   route_name: entity.view_mode_list
   parent: entity.display_mode
 entity.form_mode_list:
   title: 'Form modes'
-  description: 'Manage custom form modes.'
+  description: 'Configure form modes to edit content differently for different situations; for example, User edit or User register.'
   route_name: entity.form_mode_list
   parent: entity.display_mode
diff --git a/core/modules/entity/entity.module b/core/modules/entity/entity.module
index deadbf8..4c0d632 100644
--- a/core/modules/entity/entity.module
+++ b/core/modules/entity/entity.module
@@ -31,6 +31,17 @@ function entity_help($route_name, Request $request) {
       $output .= '<dd>' . t('Each content entity can have various editing forms appropriate for different situations, which are known as "form modes". For instance, you might want to define a quick editing mode that allows users to edit the most important fields, and a full editing mode that gives access to all the fields. You can create, edit the names of, and delete form modes on the <a href="!form-modes">Manage custom form modes page</a>. Once a form mode has been set up, you can choose which fields are available on that form within each entity sub-type on the Manage form display page. See the <a href="!field_ui">Field UI module help page</a> for more information.', array('!form-modes' => \Drupal::url('entity.form_mode_list'), '!field_ui' => \Drupal::url('help.page', array('name' => 'field_ui')))) . '</dd>';
       $output .= '</dl>';
       return $output;
+
+    case 'entity.display_mode':
+      return '<p>' . t('Display modes include view modes (used to view content differently for different situations) and form modes (used to make different entity editing forms for different situations).') . '</p>';
+
+    // View modes.
+    case 'entity.view_mode_list':
+      return '<p>' . t('Use view modes to display content differently for different situations; for example, \'Full content\' or \'Teaser\'.') . '</p>';
+
+    // Form modes.
+    case 'entity.form_mode_list':
+      return '<p>' . t('Use form modes to edit content differently for different situations; for example, \'User edit\' or \'User register\'.') . '</p>';
   }
 }