Meaning
A white square of medium-small size with an outline, between ◻️ and ▫️. It means white or empty in a compact form.
People use it as a light bullet, an unfilled box in short checklists or a soft divider in pastel-themed posts: “◽ Brunch ◽ Museum ◽ Night market” Like ◾, it normally appears as an emoji by default, which keeps its size steady next to other emoji.