Creative Commons (CC) refers to a public copyright license 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 he/she has created.
Creative Commons licenses offer creators a spectrum of choices between retaining all rights (a "classic" copyright) and relinquishing all rights (public domain), an approach called "Some Rights Reserved."
CC provides flexibility (for example, an author might choose to allow only non-commercial uses of his/her own work) and protects the people who use or redistribute an author's work from concerns of copyright infringement as long as they abide by the conditions that are specified in the license by which the author distributes the work.
Creative Commons licences are developed by Creative Commons, a global nonprofit organization that enables sharing and reuse of creativity and knowledge through the provision of free legal tools.