Creative Commons is an organisation that protects individuals by covering their work under copyright but still allowing others to use and build upon their work uncer certain circumstances. CC allows works to be used for educational purposes eg copying or distroibuting so long as due credit is given.
I have placed the relevant licence in the footer of my blog to let users know that they may use my work for non-comercial applications as long as they include due credit for the original ideas.
For more information: https://creativecommons.org.au/learn/education/