Apple designed critical alerts for iPhone and iPad notifications that must be heard even when a device is silenced, such as health and safety warnings. The distinctive tone quickly became recognizable outside its original purpose as creators sampled it for short-form videos, memes, and reaction edits. Its association with urgency makes it instantly readable to anyone familiar with an iPhone, which is why it continues to appear in comedy sketches, prank videos, and dramatic edits where a normal notification would feel too soft.