The styles
Bold, italic, bold italic, sans bold, sans italic, script, bold script, fraktur, double-struck, monospace, small caps, circled, squared, upside down and strikethrough. Bold, sans bold, double-struck, monospace and circled also have their own digits. Upside down text is reversed so it reads correctly when the screen is turned around.
Use it as an accent
A styled name or a one-line heading in a bio catches the eye. A whole caption in script is hard to read, and people who use screen readers may not be able to read it at all. Keep the message, hashtags and links in plain text and style one or two words.
Check before you paste
Look at the result on the device your audience uses. A style that looks clean on a phone can show empty boxes on an older computer when its fonts lack the character. Apps also change their rules: a field that accepts styled letters today may strip them after an update. If a style shows boxes, pick a simpler one such as bold or sans bold, which most systems display.
Plan the posts around it
Once your bio looks right, plan the posts themselves. PostBoost schedules your Instagram posts together with the other networks you post to.