LinkedIn strips rich formatting from posts — no bold button, no italics. That's why styled Unicode text became popular there: it's the only way to make a headline stand out in the feed. Used well it adds hierarchy; used badly it reads as spam. Here's the balance.
Styles that work
𝗦𝗮𝗻𝘀 𝗕𝗼𝗹𝗱 is the workhorse. It matches LinkedIn's own interface font closely, so it reads as "bold" rather than "decorated". Use it for the first line of a post or for section headers in longer posts.
𝘚𝘢𝘯𝘴 𝘐𝘵𝘢𝘭𝘪𝘤 works for emphasis on a phrase, exactly as italics would in a document. ꜱᴍᴀʟʟ ᴄᴀᴘꜱ can look sharp for short labels like section names.
Styles to avoid
Script, fraktur, bubble and glitch styles fight the platform's professional register — and more importantly, they hurt discoverability and accessibility. LinkedIn's search may not match styled words, and screen readers often announce mathematical characters letter-by-letter ("mathematical bold capital H...") or skip them entirely.
Ground rules
Style headlines, never paragraphs. Keep your name and job title in plain text so recruiters can find you. Never style keywords you want to be searchable. One or two styled lines per post is emphasis; ten is noise.