When Windows 10 wants to inform you of some important development, it will display a small notification in the bottom right corner. If you wish to, you can change the Notifications display time for which this notification is displayed on your desktop.
You can make the Notifications last longer by adjusting the Show notifications for setting. Change the notification time from 5 seconds to 5 minutes.
To do this, open Settings app > Ease of Access > Other options. Here click on the Show notifications for drop-down and select any time from 5 seconds to 5 minutes.