Creative Commons Licenses are public copyright licenses that enable the author to define what the users are allowed to do with the published work.
CC licenses are FREE of charge and DO NOT require any REGISTRATION.
Which Creative Commons License do I chose when creating my work? Follow this link to help you choose the proper license.
What can I do with a copyrighted work that has been created under a creative common license?
Below are links to the Creative Commons website defining each license and its usage: