Press Windows key + I and click System. Go to Notifications & actions. From there, you'll see the list of options on whether to enable or disable the notifications. Toggle all the options to Off if you don't want any notifications.
What is Windows push notifications user service?
The Windows Push Notification Services (WNS) enable third-party developers to send toast, tile, badge, and raw updates from their own cloud service. This provides a mechanism to deliver new updates to your users in a power-efficient and dependable way.
How do I stop push service?
And for notifications from other apps on Android, open Settings, tap Apps & notifications and then tap Notifications. Here's everything you need to turn off push notifications on desktop and on Android.