The document discusses copyright and Creative Commons licensing for content shared online. It explains that while copyright gives creators exclusive rights over their work, Creative Commons licenses allow creators to selectively grant permission for others to use their work. The document outlines two methods for determining if a work can be legally used: 1) research the copyright and licensing terms, and 2) identify works licensed under Creative Commons which provide universal access while still protecting creator rights. Examples of organizations that use Creative Commons include Flickr, Wikipedia, and MIT OpenCourseWare.