Extra data is data that is not in the form of text or images. It can be audio, video, or any other type of media.
Extra data can be used to provide more information about a particular subject and to make the content more interactive and engaging for the reader.
Here are some examples:
- Adding a video on how a product is manufactured
- Adding an audio file with background music from a movie
- Providing additional information by adding links to other articles on the same topic
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