Merge branch 'docs/dashboard' into 'master'

Documented the Admin Area's `Dashboard`

See merge request gitlab-org/gitlab-ce!27445

doc/user/admin_area/index.md

@@ -16,7 +16,7 @@ The Admin Area is made up of the following sections:
 
 | Section           | Description                                                                                                                                              |
 |:------------------|:---------------------------------------------------------------------------------------------------------------------------------------------------------|
-| Overview          | View your GitLab Dashboard, and maintain projects, users, groups, jobs, runners, and Gitaly servers.                                                     |
+| Overview          | View your GitLab [Dashboard](#admin-dashboard), and maintain projects, users, groups, jobs, runners, and Gitaly servers.                                                     |
 | Monitoring        | View GitLab system information, and information on background jobs, logs, [health checks](monitoring/health_check.md), request profiles, and audit logs. |
 | Messages          | Send and manage [broadcast messages](broadcast_messages.md) for your users.                                                                              |
 | System Hooks      | Configure [system hooks](../../system_hooks/system_hooks.md) for many events.                                                                            |
@@ -27,3 +27,23 @@ The Admin Area is made up of the following sections:
 | Labels            | Create and maintain [labels](labels.md) for your GitLab instance.                                                                                        |
 | Appearance        | Customize [GitLab's appearance](../../customization/index.md).                                                                                           |
 | Settings          | Modify the [settings](settings/index.md) for your GitLab instance.                                                                                       |
+
+## Admin Dashboard
+
+The Dashboard provides statistics and system information about the GitLab instance.
+
+To access the Dashboard, either:
+
+- Click the Admin Area icon (the wrench icon).
+- Visit `/admin` on your self-managed instance.
+
+The Dashboard is the default view of the Admin Area, and is made up of the following sections:
+
+| Section    | Description   |
+|------------|---------------|
+| Projects   | The total number of projects, up to 10 of the latest projects, and the option of creating a new project. |
+| Users      | The total number of users, up to 10 of the latest users, and the option of creating a new user. |
+| Groups     | The total number of groups, up to 10 of the latest groups, and the option of creating a new group. |
+| Statistics | Totals of all elements of the GitLab instance. |
+| Features   | All features available on the GitLab instance. Enabled features are marked with a green circle icon, and disabled features are marked with a power icon. |
+| Components | The major components of GitLab and the version number of each. A link to the Gitaly Servers is also included. |
\ No newline at end of file