tl;dr: Notification channels, which were introduced with Android 8, are now disabled by default and one has now to enable them manually (screenshots below by Android Police):
tl;dr: Notification channels, which were introduced with Android 8, are now disabled by default and one has now to enable them manually (screenshots below by Android Police):
One-third of that page: Samsung is being really annoying!
The other two-thirds of that page: advertising for Samsung