A Creative Commons (CC) license is a public copyright licenses that enable the free distribution of an otherwise copyrighted work. A CC license is used when an author wants to give people the right to share, use and build upon a work that they have created. CC provides an author flexibility (for example, they might choose to allow only non-commercial uses of their own work) and protects the people who use or redistribute an author's work, so they don’t have to worry about copyright infringement, as long as they abide by the conditions that are specified in the license by which the author distributes the work.There are several types of CC licenses. The licenses differ by several combinations that condition the terms of distribution. Learn more about Creative Commons license at http://creativecommons.org/licenses/?lang=en.