Creative Commons provides free tools that let authors, scientists, artists, and educators easily mark their creative work with the freedoms they want it to carry. You can use CC to change your copyright terms from "All Rights Reserved" to "Some Rights Reserved."
Creative Commons licenses apply to works that are protected by copyright. Generally, works that are protected by copyright are: books, scripts, websites, lesson plans, blogs and any other forms of writings; photographs and other visual images; films, video games and other visual materials; musical compositions, sound recordings and other audio works.
Creative Commons licenses do not apply to things such as ideas, factual information or other things that are not protected by copyright.
You can apply a Creative Commons license online to a work by selecting the license that suits your preferences. You will get a code which will automatically generate the “Some Rights Reserved” button and a statement that your work is licensed under a Creative Commons license, or a “No Rights Reserved” button if you choose to dedicate your work to the public domain. This acts as a notice to people who see your work that your work is licensed under the applicable Creative Commons license.
A Creative Commons license is based on copyright. So they apply to all works that are protected by copyright law.
Creative Commons licenses give you the ability to dictate how others may use you works.
Creative Commons licenses attach to the work and authorize everyone who comes in contact with the work to use it consistent with the license.
Visit Creative Commons for much more information.