Earlier Facebook users can only express their emotions by using LIKE button but now
recently Facebook has introduced Facebook reactions thru which users can express their emotions in more clear responses by using Like, Love , Haha, Wow, Sad and Angry reactions button.
To use this Facebook emoticon button you simply have to do the following ;
On Mobile devices : Just hold the LIKE button
On Desktop : Hover over the like button by using mouse pointer.
Watch the below video for more guidance,