Cite as: 601 U. S. ____ (2024) 13 Opinion of the Court president. The context of Freed’s speech is hazier than that of the hypothetical school board president. Had Freed’s account carried a label (e.g., “this is the personal page of James R. Freed”) or a disclaimer (e.g., “the views expressed are strictly my own”), he would be entitled to a heavy (though not irrebuttable) presumption that all of the posts on his page were personal. Markers like these give speech the benefit of clear context: Just as we can safely presume that speech at a backyard barbeque is personal, we can safely presume that speech on a “personal” page is personal (absent significant evidence indicating that a post is official).2 Conversely, context can make clear that a social-media account purports to speak for the government—for instance, when an account belongs to a political subdivision (e.g., a “City of Port Huron” Facebook page) or is passed down to whomever occupies a particular office (e.g., an “@PHuronCityMgr” Instagram account). Freed’s page, however, was not designated either “personal” or “official,” raising the prospect that it was “mixed use”—a place where he made some posts in his personal capacity and others in his capacity as city manager. Categorizing posts that appear on an ambiguous page like Freed’s is a fact-specific undertaking in which the post’s content and function are the most important considerations. In some circumstances, the post’s content and —————— 2 An official cannot insulate government business from scrutiny by conducting it on a personal page. The Solicitor General offers the particularly clear example of an official who designates space on his nominally personal page as the official channel for receiving comments on a proposed regulation. Because the power to conduct notice-and-comment rulemaking belongs exclusively to the State, its exercise is necessarily governmental. Similarly, a mayor would engage in state action if he hosted a city council meeting online by streaming it only on his personal Facebook page. By contrast, a post that is compatible with either a “personal capacity” or “official capacity” designation is “personal” if it appears on a personal page.