diff --git a/source/_components/google_assistant.markdown b/source/_components/google_assistant.markdown
index 412eff60a5f..f7eb8ce322e 100644
--- a/source/_components/google_assistant.markdown
+++ b/source/_components/google_assistant.markdown
@@ -197,6 +197,12 @@ Currently, the following domains are available to be used with Google Assistant,
   The domain groups contains groups containing all items, by example group.all_automations. When telling Google Assistant to shut down everything, this will lead in this example to disabling all automations
 </p>
 
+### {% linkable_title Secure Devices %}
+
+Certain devices are considered secure, including anything in the `lock` domain, and `covers` with device types `garage` and `door`.
+
+By default these cannot be opened by Google Assistant unless a `secure_devices_pin` is set up. To allow opening, set the `secure_devices_pin` to something and you will be prompted to speak the pin when opening the device. Closing and locking these devices does not require a pin.
+
 ### {% linkable_title Media Player Sources %}
 
 Media Player sources are sent via the Modes trait in Google Assistant.