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
Facebook like button the site's content with friends. When a user clicks the like button, the content appears in the News Feeds of that user's friends. The button also displays the number of users who liked each piece of content, and may show a full or partial list of those users. The ability to like users' comments was added in June 2010, and the ability to react with one of five pre-defined emotions, including "Love", "Haha", "Wow", "Sad", or "Angry", was added in May 2012. Facebook describes "liking" as an "easy way to let people know that you enjoy it without leaving a