When you take a photo with modern digital cameras or your smartphone camera, there is a lot of information (EXIF data) that the device embeds into the photo that can be viewed in the image properties. When you share the photo with other people, if you don't want them to see that data, you can remove it with certain tools.
An internet search for "How to remove exif data from photo" will lead you to a lot of tools.
- GIMP users: Just open the image in GIMP, choose "Export as" and when exporting the file, uncheck the "Save EXIF data" option.
- Ubuntu users: Simply open a terminal in the folder that contains the images you want to remove exif data from and type mogrify -strip *.jpg to remove exif data from all jpg files. Else instead of "*.jpg", specify the particular filename.
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