Facebook like button
[1] The like button enables users to easily interact with status updates, comments, photos and videos, links shared by friends, and advertisements.
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".
Facebook states in its Terms of Service agreement that users may only create one personal page, and it has ongoing efforts against the spread of fake accounts.
[10] After more than a year in testing,[11] which included October 2015 availability in Ireland and Spain,[12] Facebook officially rolled out "Reactions" to users worldwide on February 24, 2016.
The feature allows users to long-press on the like button to get options between five pre-defined emotions ranging from "Love", "Haha", "Wow", "Sad", and "Angry".
"[22] In February 2016, Facebook announced its "Reactions", offering different ways for users to interact with posts through the like button, including "Love", "Haha", "Wow", "Sad", and "Angry",[11][13] with the later addition of "Care" in March 2020 due to the COVID-19 pandemic.
[24][25] Speaking at the company's F8 developer conference on April 21, 2010, the day of the launch, CEO Mark Zuckerberg said "We are building a Web where the default is social".
[25][26] The like button is implemented similarly to an advertising network, in that as more sites participate, Facebook is given a vast amount of information about who visits which websites and in what time period.
[27] A week after the release of the social plugins, Facebook announced that 50,000 websites had installed the features, including the like button.
[32] Due to social media's influence in shaping reputations,[33] there exist companies specializing in selling "likes" from fake accounts.
[34] This has caused issues for companies advertising on Facebook, due to receiving an abundance of likes without credibility that distort actual user metrics.
[34] Facebook's Terms of Service agreement states that users are only allowed to have one personal page,[35] and it has an ongoing "war" against fake accounts.
[46] In August 2011, the German Data Protection Commissioner's Office ordered federal agencies to stop using Facebook and remove the like button from their websites.
[49] In its defense, Facebook told CNET in June 2010 that information on who visited which websites is anonymized after three months, and is not shared with or sold to third parties.
One of the employees fought back in court, with the argument that a "like" should be protected by the First Amendment to the United States Constitution about free speech.
[60] Research shows that Facebook likes can be automatically processed to infer intimate details about an individual, such as sexual orientation, political and religious views, race, substance use, intelligence, and personality.
