There are six main types of Creative Commons licenses, which allow creators to specify how others may use their work. These licenses are:
1. Attribution (CC BY): This license allows others to use, distribute, remix, and build upon the original work, even for commercial purposes, as long as they give credit to the original creator.
2. Attribution-ShareAlike (CC BY-SA): This license allows others to use, distribute, remix, and build upon the original work, even for commercial purposes, as long as they give credit to the original creator and license any new works created using the same CC BY-SA license.
3. Attribution-NoDerivs (CC BY-ND): This license allows others to use and distribute the original work, even for commercial purposes, as long as they give credit to the original creator and do not make any changes to the work.
4. Attribution-NonCommercial (CC BY-NC): This license allows others to use, distribute, remix, and build upon the original work, but only for non-commercial purposes, as long as they give credit to the original creator.
5. Attribution-NonCommercial-ShareAlike (CC BY-NC-SA): This license allows others to use, distribute, remix, and build upon the original work, but only for non-commercial purposes, as long as they give credit to the original creator and license any new works created using the same CC BY-NC-SA license.
6. Attribution-NonCommercial-NoDerivs (CC BY-NC-ND): This license allows others to use and distribute the original work, but only for non-commercial purposes and without making any changes to the work, as long as they give credit to the original creator.
These licenses are designed to provide a flexible and standardized way for creators to share and protect their work while allowing others to use and build upon it in various ways.