Facebook June 2010. After extensive testing and 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. Facebook Messenger is an instant messaging service and software application. Originally developed as Facebook Chat in 2008, the company revamped its messaging service in 2010, and subsequently released standalone iOS and Android
Criticism of Facebook try to detect fake profile using automated means, in one such work machine learning techniques are used to detect fake users. In September 2008, Facebook permanently moved its users to what they termed the "New Facebook" or Facebook 3.0. This version contained several different features and a complete layout redesign. Between July and September, users had been given the option to use the new Facebook in place of the original design, or to return to the old design. Facebook's decision to migrate their users was met with some controversy in their community. Several groups started opposing the decision, some with