Black Small Square

It means exactly what it shows: a small black square used as punctuation. It comes from the Geometric Shapes block, a set of plain squares, circles and triangles that printers and typesetters had used for decades before emoji existed. The small black square is the classic square bullet: the mark that starts an item in a list when a round dot • looks too ordinary.

On phones it doubles as a layout tool. People type it at the start of each line to make a clean list in a chat message or a caption, use it between short facts in a profile ("Photographer ▪️ Lisbon ▪️ bookings below") so everything fits on one line, or repeat it to draw a thin rule across a post. It is popular with anyone who wants structure without colour: in black and white it never clashes with the rest of the text.

The invisible variation selector at the end (U+FE0F) asks the device to show it as an emoji rather than a text character. That is why the same square can look slightly bolder or more rounded in a messaging app than in a word processor.

What does it mean when someone sends ▪️?

Nothing emotional; read the words around it. A friend who sends ▪️ at the start of several lines is making a list. Someone who puts it between words in a bio is separating them. It carries no tone, no mood and no established slang, so there is nothing to decode and nothing to take offence at.

A square on its own, with no text, is almost always an accident or a leftover from formatting: a line where the text was deleted but the bullet stayed. If a message arrives as a lone ▪️, asking what they meant is the right move; guessing at a secret meaning is not.