Facebook like button years of questions from the public about whether it had an intention to incorporate a "Dislike" button, Facebook officially rolled out "Reactions" to users worldwide on February 24, 2016, letting users long-press on the like button for an option to use one of five pre-defined emotions, including "Love", "Haha", "Wow", "Sad", or "Angry". Reactions were also extended to comments in May 2017. The like button is one of Facebook's social plug-ins, in which the button can be placed on third-party websites. Its use centers around a form of an advertising network, in which it gathers information about which users visit
Criticism of Facebook CEO Mark Zuckerberg announced in May 2017 that the company would hire 3,000 people to review content and invest in tools to remove videos faster. In 2008, Facebook was criticized for hosting groups dedicated to promoting anorexia. The groups promoted dramatic weight loss programs, shared extreme diet tips, and posted pictures of emaciated girls under "Thinspiration" headlines. Members reported having switched to Facebook from Myspace, another social networking service, due to a perceived higher level of safety and intimacy at Facebook. In a statement to "BBC News", a Facebook spokesperson stated that "Many Facebook groups relate to controversial topics; this