diff --git a/core/modules/toolbar/toolbar.module b/core/modules/toolbar/toolbar.module
index e07e8f9..215cac4 100644
--- a/core/modules/toolbar/toolbar.module
+++ b/core/modules/toolbar/toolbar.module
@@ -23,11 +23,13 @@ function toolbar_help($route_name, RouteMatchInterface $route_match) {
   switch ($route_name) {
     case 'help.page.toolbar':
       $output = '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Toolbar module displays links to top-level administration menu items and links from other modules at the top of the screen. For more information, see the online handbook entry for <a href="@toolbar">Toolbar module</a>.', array('@toolbar' => 'http://drupal.org/documentation/modules/toolbar')) . '</p>';
-      $output .= '<h3>' . t('Uses') . '</h3>';
+      $output .= '<p>' . t('The Toolbar module provides a toolbar for site administrators, which displays tabs and trays provided by the Toolbar module itself and other modules. For more information, see the <a href="!toolbar_docs">online documentation for the Toolbar module</a>.', array('!toolbar_docs' => 'https://drupal.org/documentation/modules/toolbar')) . '</p>';
+      $output .= '<h4>' . t('Terminology') . '</h4>';
       $output .= '<dl>';
-      $output .= '<dt>' . t('Displaying administrative links') . '</dt>';
-      $output .= '<dd>' . t('The Toolbar module displays a bar containing top-level administrative components across the top of the screen. Below that, the Toolbar module has a <em>drawer</em> section where it displays links provided by other modules, such as the core <a href="@shortcuts-help">Shortcut module</a>. The drawer can be hidden/shown by clicking on its corresponding tab.', array('@shortcuts-help' => url('admin/help/shortcut'))) . '</dd>';
+      $output .= '<dt>' . t('Tabs') . '</dt>';
+      $output .= '<dd>' . t('Tabs are buttons, displayed in a bar across the top of the screen. Some tabs execute an action (such as starting Edit mode), while other tabs toggle which tray is open.') . '</dd>';
+      $output .= '<dt>' . t('Trays') . '</dt>';
+      $output .= '<dd>' . t('Trays are usually lists of links, which can be hierarchical like a menu. If a tray has been toggled open, it is displayed either vertically or horizontally below the tab bar, depending on the browser width. In wide browser widths, the user has the ability to toggle from vertical to horizontal, using a link at the bottom or right of the tray; hierarchical menus only have open/close behavior in vertical mode.') . '</dd>';
       $output .= '</dl>';
       return $output;
   }