What data is kept when the "Remove EXIF" option is selected?

If you choose to remove the EXIF data by enabling this option in the plugin settings (Settings > ShortPixel > General), note that comments, IPTC, and XMP markers will also be removed.

If you choose not to remove EXIF, then the comments, IPTC and XMP markers will be preserved.

Please note that the ICC (Color Profile) data will not be removed regardless of the "Remove EXIF" setting value. The reason behind this is that removing the ICC color profile could lead to images with altered colors.