If you want to give people the right to share, use, and even build upon a work you’ve created, you should consider publishing it under a Creative Commons license. website
We have chosen the CC-BY-SA license.
This license is often compared to “copyleft” free and open source software licenses. All new works based on yours will carry the same license, so any derivatives will also allow commercial use.
This is the license used by Wikipedia, and is recommended for materials that would benefit from incorporating content from Wikipedia and similarly licensed projects.