Creative Commons Attribution-ShareAlike 4.0 International
You are free to:
Share — copy and redistribute the material in any medium or format
Adapt — remix, transform, and build upon the material for any purpose, even commercially.
Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made.
ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
More information: Attribution-ShareAlike 4.0 International (CC BY-SA 4.0).