It can help to alert the user of something that happened, in a part of the screen that is not currently on focus, and that is not important enough to disrupt the user by moving VoiceOver’s focus to a different place.
It can be useful to announce certain messages like errors or long running tasks that have finished (i.e. a download that finished) or with custom notifications and snack bars.
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It is useful to know these VoiceOver gestures to activate/deactivate Screen Curtain, pause/resume VoiceOver, easily simulate a long press for opening context menus, or quickly move the cursor to the screen's first or last elements.
Guidelines from Apple: Begin with a verb that explains the results of the action. Avoid using the imperative form of a verb because that can make it sound like a command. Don’t include the action type. Don’t include the control. https://developer.apple.com/documentation/objectivec/nsobject-swift.class/accessibilityhint
All the accessibility capabilities you can check for, have counterpart notification names you can observe in case the user changes its preferences while using your app. https://x.com/dadederk/status/1577435144129892352
