Facebook like button comment". After more than a year in testing, which included October 2015 availability in Ireland and Spain, 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". In June 2017, in celebration of Pride month, Facebook introduced a rainbow flag as part of its Reactions options. During a public Q&A session in December 2014, CEO Mark Zuckerberg answered questions regarding the public's wish to have a "dislike" button on Facebook. Zuckerberg said: "There’s
Criticism of Facebook have hosted seminars and presentations to discuss ramifications of students' use of Facebook and other social-networking sites. The EDUCAUSE Learning Initiative has also released a brief pamphlet entitled "7 Things You Should Know About Facebook" aimed at higher education professionals that "describes what <nowiki>[Facebook]</nowiki> is, where it is going, and why it matters to teaching and learning". Some research on Facebook in higher education suggests that there may be some small educational benefits associated with student Facebook use, including improving engagement which is related to student retention. 2012 research has found that time spent on Facebook is related to involvement