Dark post
A Post Dark (also known as "hidden publication") is a social publication that has not been published and is promoted as an advertisement for a specific audience. It is a publication that cannot be found in an organic way and does not appear in the profile of your brand. Hidden publications can help you with divided tests and help you prevent your timeline from being filled with promotional publications.
Although the term "Dark Post" may make this content look like something questionable, remember that any user can search for your Facebook ads through the transparency function of the page.