What ▂ means
In the run ▁▂▃▄▅▆▇█, ▂ is the second step, two eighths of a cell tall. Sparkline characters like these let scripts and terminal dashboards draw a small chart inside one line of text.
Some terminals draw block elements themselves; others leave the shape to the font. That is why ▂ can look taller, thinner or misaligned, and carefully built text art can break on another screen.
It comes from teletext-era semigraphics
Block characters descend from semigraphics: text cells used as tiny graphic surfaces. Teletext, the TV information-page service of the early 1970s, built simple pictures this way, and ANSI art and Unicode text art carried the idea forward.
Don't confuse it with
4Questions people ask
1Why does ▂ show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type ▂
▂\2582Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.

