MediaWiki:Gwtoolset-detect-license-explanation/en

The MediaWiki template may have a  parameter. When it does, an attempt to detect the copyright license based on the metadata value can be made. GWToolset looks for Creative Commons URLs that match possible copyright licenses, e.g., https://creativecommons.org/licenses/by-sa/3.0/ matches the MediaWiki license template. If this box is left unchecked, the raw metadata value for each item in the batch upload will be placed in the permission parameter.