All users of files found on Wikimedia Commons must be given the Four Freedoms:
The freedom to use the media.
The freedom to study the media and use information gained from it.
The freedom to make and distribute copies of the media.
The freedom to make changes to the media and distribute derived versions.
Traditional copyright law does not grant these freedoms, and by default, content you find on the Internet is copyrighted and may not be uploaded here. In addition, claims of fair use are explicitly NOT permitted on Wikimedia Commons. Only upload files that either:
are in the public domain in both the original country (author died more than 70 years ago) and in the United States, or;
are explicitly covered by a license which grants the Four Freedoms.
Description: Write a descriptive and concise caption.
Source: The URL where you found the file, or write "own work" if it is your own creation.
Date: The creation date, or publication date if creation date is unknown.
Author: The names(s) of the author(s).
Permission (optional): If you're not the original author and the file was not online under a free license, then you may have to forward the author's permission to permissions-commonswikimedia.org. Select the appropriate license from the menu, or write the copyright tag in this field. See also VRT.
other_versions (optional): If the file is a modified or composed version of other file(s) on Wikimedia Commons, you may show them here. For example, in a <gallery> … </gallery> with one filename per line.