I'm having trouble understanding the purpose and need to use XML [closed]

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Basically, why use xml? I mean I know its for structering data, but still not seeing it's real-world benefits? Like with databases for a website, why not just take the user input directly instead of from and xml file first? I'm just not seeing the point.

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When you want to exchanges datas between two systems for example, you may need structured, human-readable datas.