Meaning
The smallest white square in the set, a tiny outlined box. It means white or empty, and its main job is to be a light, discreet bullet point or spacer.
People line it up in captions, bios, menus and price lists when they want structure without heavy marks, often to separate details on a single line: “▫️ Free Wi-Fi ▫️ Pet friendly ▫️ Open late” On white backgrounds it is very faint, so it suits dark themes or alternating with ▪️. It may also appear as a plain text character.