What Do Public Domain & Creative Commons Mean? - Finding Public Domain & Creative Commons Media - Research Guides at Harvard Library

"When you are adding images, videos and other content that you did not create to your presentation, it is important to make sure that you are not violating anyone's copyright. One way to do so is to find public domain images for your presentations ... If you can't find Public Domain media that fit your needs, you can also use Creative Commons-licensed content as long as you ensure that you correctly attribute this content to its creator and otherwise meet the terms of the license under which the image is offered. You can find more information about this on the Creative Commons FAQ ..."