Everything About Fiction You Never Wanted to Know.
This template is used to mark images as fair use - still under copyright (or not definitely known to be licensed or public domain), but used in a limited manner for criticism, review, or scholarly research. (This, by the way, is why All The Tropes requires descriptions on character and recap pages - a list of tropes might not count as criticism, review, or scholarly research, and these pages tend to get images added to them.)
Type {{fairuse}} on the image information page.