For which programs are these used for? I assume Skype is one of them which supports notifications, but I'm using the desktop version since I disliked the 8.1 app version of windows 8.1.
I get notifications for everything basically. Anti-virus, email, kodi, and I have noticed a lot of programs are starting to add it. WinSCP has even shown up a few times.
I suspect it will be used for emails by most people. I was surprised to see Bittorrent notifications come up in the new designed boxes, rather than a shit tooltip. That's probably just a general Windows 10 improvement and not a program modification.