Bold where thereโs no bold button
Most social apps donโt let you format text. Bold Unicode letters get around that: they are characters, not formatting, so they stay bold when you paste them into a bio, caption, comment or post.
Use it with care
Screen readers may read these characters strangely or skip them, and search wonโt match them to normal words. Keep the important words, like your name or your shop name, in plain text somewhere too. Very old devices may show empty boxes.