CC BY-SA-4.0

CC BY-SA-4.0 (Creative Commons Attribution-ShareAlike 4.0 International) is a free copyright license developed by Creative Commons that enables creators to give legal permission to share, remix, adapt, and build upon their work—even commercially—as long as attribution is provided and derivative works are licensed similarly. It is widely adopted by individuals, organizations, and major platforms seeking to legally share knowledge, culture, images, and other creative content while fostering openness and collaboration.