Creative Commons is a licensing system under which authors or producers of a work offer some of their rights to others to reuse their work under certain specified conditions.
The licence is attached to the content and is available in various forms allowing the rights holder to retain a level of control over how their work is treated.
CC licences have various advantages, including ease of use, widespread adoption, choice and flexibility, human-readable, machine-readable and symbolic representations of the licences, and a direct link between the resource and its licence.