diff --git a/docs/core/services/notification.service.md b/docs/core/services/notification.service.md
index 28a729fd8e..070995acac 100644
--- a/docs/core/services/notification.service.md
+++ b/docs/core/services/notification.service.md
@@ -28,6 +28,22 @@ Shows a notification message with optional feedback.
     -   _action:_ `string`  - Caption for the response button
     -   _config:_ `number|MatSnackBarConfig`  - (Optional) Time before notification disappears after being shown or MatSnackBarConfig object
     -   **Returns** [`MatSnackBarRef`](https://material.angular.io/components/snack-bar/overview)`<any>` - Information/control object for the SnackBar
+- **showError**(message: `string`, action: `string`): [`MatSnackBarRef`](https://material.angular.io/components/snack-bar/overview)`<any>`<br/>
+  Rase error message
+    -   _message:_ `string`  - The message (or resource key) to show.
+    -   _action:_ `string`  - Caption for the response button
+    -   **Returns** [`MatSnackBarRef`](https://material.angular.io/components/snack-bar/overview)`<any>` - Information/control object for the SnackBar
+- **showInfo**(message: `string`, action: `string`): [`MatSnackBarRef`](https://material.angular.io/components/snack-bar/overview)`<any>`<br/>
+  Rase info message
+    -   _message:_ `string`  - The message (or resource key) to show.
+    -   _action:_ `string`  - Caption for the response button
+    -   **Returns** [`MatSnackBarRef`](https://material.angular.io/components/snack-bar/overview)`<any>` - Information/control object for the SnackBar
+- **showWarning**(message: `string`, action: `string`): [`MatSnackBarRef`](https://material.angular.io/components/snack-bar/overview)`<any>`<br/>
+  Rase warning message
+    -   _message:_ `string`  - The message (or resource key) to show.
+    -   _action:_ `string`  - Caption for the response button
+    -   **Returns** [`MatSnackBarRef`](https://material.angular.io/components/snack-bar/overview)`<any>` - Information/control object for the SnackBar
+
 
 ## Details