From Wiki ...
In
internet slang , a
troll is a person who posts inflammatory, insincere, digressive,
[1] extraneous , or
off-topic messages in an
online community (such as
social media (
Twitter ,
Facebook ,
Instagram , etc.), a
newsgroup ,
forum ,
chat room , or
blog ), with the
intent of provoking readers into displaying
emotional responses,
[2] or
manipulating others' perception. This is typically for the troll's amusement, or to achieve a specific result such as disrupting a rival's online activities or manipulating a political process. Even so, Internet trolling can also be defined as purposefully causing confusion or harm to other users online, for no reason at all.
[3]