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 old "pokes" all the way to the question if sharing and new functions on Facebook should be opt-in or opt-out. The second wave of 6 more complaints was targeting more issues including one against the "Like" button. The most severe could be a complaint that claims that the privacy policy, and the consent to the privacy policy is void under European laws. In an interview with the "Irish Independent", a spokesperson said that the DPC will "go and audit Facebook, go into the premises and go through in great detail every aspect of security". He continued by saying: "It's a