From Wikipedia -

https://en.wikipedia.org/wiki/Content_moderation

"On websites that allow users to create content, content moderation is the process of detecting contributions that are irrelevant, obscene, illegal, harmful, or insulting. The purpose of content moderation is to remove or apply a warning label to problematic content or allow users to block and filter content themselves."

Facebook Community Standards -

https://transparency.meta.com/en-gb/policies/community-standards/

TikTok Community Guidelines -

https://www.tiktok.com/community-guidelines/en