How should a backend server properly and securely send targeted push notifications through FCM using the Firebase Admin SDK, rather than relying purely on manually sending them directly through the Firebase console?

For a genuinely production ready application, push notifications are typically genuinely sent programmatically from your own trusted backend server using the Firebase Admin SDK, which lets your server properly authenticate securely using a dedicated service account, target one or several specific devices by their own particular tokens or a given topic, and include genuinely custom structured data payloads tailored to your app's own genuinely specific particular business logic, such as automatically sending a personalized notification the very moment a specific order's own status genuinely actually changes within your own backend database.

// Node.js backend example using the Firebase Admin SDK
admin.messaging().send({
  token: deviceToken,
  notification: { title: 'Order Shipped', body: 'Your order is on its way!' },
});