Broad license to user content
You are agreeing to let Meta use, modify, and sublicense your content to others.
“you grant us a non-exclusive, transferable, sub-licensable, royalty-free, and worldwide license to host, use, distribute, modify, run, copy, publicly perform or display, translate, and create derivative works of your content (consistent with your privacy and application settings).”
What that means: Your photos, videos, or posts can potentially be used or shared by other companies or partners under license from Meta.
Meta takes a very broad license that allows them to sublicense your content to third parties and create derivative works, rather than just hosting it for you.