Everything created on a digital device, such as a smartphone or laptop, has a digital fingerprint attached to the file. That digital fingerprint is called metadata. It sticks to the document, whether a video, photo, spreadsheet or other document, until some person or program removes it.
For example, if you take a photo with your phone and view the photo with a metadata viewer, the data will include what phone you used, the date and time, and the latitude and longitude.
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