black large square (U+2B1B)

The black square emoji (⬛️) is a simple geometric shape that consists of a solid black square. It is often used to represent a filled-in or checked-off box, indicating completion or confirmation. It can also be used to convey a sense of finality or to mark the end of a list or series. In some contexts, it may be used as a symbol of solidarity or to show support for a cause. Additionally, it can be used as a design element or to add visual interest to a message.