The document discusses Creative Commons licenses, which allow creators to choose how others can share and use their work. There are six main Creative Commons licenses that differ in whether others can share the work (attribution only or attribution-sharealike), make modifications to it (attribution-sharealike or attribution-noderivatives), and whether use is limited to non-commercial purposes (attribution-noncommercial). By selecting a Creative Commons license, creators can control how their work is used while also allowing some level of sharing, reuse, or remixing by others.