Definition & Meaning of "Facebook official"in English

What does "Facebook official" mean in relationship slang?

The phrase "Facebook official" refers to a romantic relationship that has been publicly confirmed on Facebook, usually by changing relationship status or posting as a couple online. The structure combines the platform name with "official" to suggest public recognition and social validation. The term became especially popular in the late 2000s and early 2010s, when relationship statuses on Facebook became a major part of online dating culture.