diff --git a/aio/content/start/start-data.md b/aio/content/start/start-data.md
index 2b89ae94db..a8f5393659 100644
--- a/aio/content/start/start-data.md
+++ b/aio/content/start/start-data.md
@@ -101,6 +101,12 @@ This section walks you through using the cart service to add a product to the ca
 
         <code-example header="src/app/product-details/product-details.component.html" path="getting-started/src/app/product-details/product-details.component.html">
         </code-example>
+    
+    <div class="alert is-helpful">
+
+    The line, `<h4>{{ product.price | currency }}</h4>` uses the `currency` pipe to transform `product.price` from a number to a currency string. A pipe is a way you can transform data in your HTML template. For more information about Angular pipes, see [Pipes](guide/pipes "Pipes").
+
+    </div>
 
 1. To see the new "Buy" button, refresh the application and click on a product's name to display its details.