Creative Commons is a non-profit organization that offers free copyright licenses for creative works. The document discusses six different Creative Commons licenses that vary in what uses are allowed, including whether derivatives can be made, the work can be used commercially, and any new works must use the same license. The licenses range from most flexible, like Attribution-ShareAlike, to most restrictive, like Attribution-NonCommercial-NoDerivs. The purpose is to clearly define how others can share and use creative works while still giving credit to the original creators.