Remember the Desktop Cleanup Wizard from Windows XP? It popped up regularly saying, “You have unused icons on your desktop.” To this day I have no idea what an unused icon is…and it probably gets my vote for worst notification ever.
Good notifications and error messages require care. They’re not necessarily hard, but they are often overlooked – to the detriment of your overall product experience. Because notifications often occur at times of anxiety and annoyance, a bad notification can ruin your UX; while a good notification can take a moment of frustration and turn it around.