This document discusses Creative Commons licensing and its use on Flickr. It provides background on copyright law and how Creative Commons licenses allow for legal sharing and reuse of creative works, while still providing attribution and control to creators. The document outlines the history and goals of Creative Commons, how different licenses can be used to manage access and reuse of photos, text, music and videos. It promotes Creative Commons as enabling easy collaboration and sharing of works worldwide. Flickr is highlighted as a platform where many photos are shared and accessed using Creative Commons licenses.