The Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License (CC BY-NC-SA 4.0) is a type of open content license that allows others to remix, tweak, and build upon the licensed work non-commercially, as long as they credit the creator and license their new creations under the identical terms. This license is often used to promote the sharing and adaptation of creative works while ensuring the original creator is acknowledged and the new works are shared alike.