The black medium square emoji is mostly used while texting just because of how simple it is. This symbol is also used to represent a playing board, like for checkers.
NOTE: Black Medium Square was accepted in 2002 as part of Unicode 3.2 and in 2015 labeled as Emoji 1.0.
◼️ Black Medium Square
:black_medium_square: (Github, Slack)◼️Black Medium Square Emojiemojiemoji meaning