The document discusses the different types of Creative Commons licenses. It explains that CC BY allows others to distribute, remix, tweak, and build upon the work even for commercial purposes, as long as they give credit to the original creator. CC BY-SA allows others to remix, tweak, and build upon the work even for commercial purposes, as long as they give credit and license their new creations under the same terms. CC BY-ND allows others to copy and distribute the work verbatim for non-commercial purposes only, giving credit to the original creator.