Creative Commons licenses give a standardized way to grant the public permission to use their creative work under copyright law. From the reuser’s perspective, the presence of a Creative Commons license on a copyrighted work answers the question what can I do with this work.
CC-licence system consists of four terms (BY, NC, ND, SA). Six basic Creative Commons licences are based on four licence terms. Every licence has a BY-term, which means that the name of the author must always be mentioned properly.
Picture: Petra Boije (CC-BY-SA 4.0).