'Private' and 'hidden' mean different things to Facebook

Facebook's leadership made a pretty heavy-handed indication this year that it believes Facebook Groups are the future of the app. As the Groups feature has come front-and-center in recent redesigns, Facebook has decided that the language they have been using to describe the visibility of "Public," "Closed" and "Secret" Groups isn't as clear as it should be, so the company is switching it up. In a way, this is kind of just Facebook throwing more privacy-related labels in their app to change perceptions while the feature sets stay the same, but denoting the visibility of a "closed" group in search was probably the biggest point of confusion here that Facebook was aiming to rectify.