Each platform rewards a different tone. LinkedIn wants a professional story with white space, TikTok wants curiosity in one line, X demands brevity under 280 characters. Copy-pasting one caption everywhere reads as lazy and kills reach on all but one.
They’re built from the meaningful words in your topic plus a few evergreen creator tags. Treat them as a starting point — swap in 2-3 niche-specific and location tags you know your audience searches for.
Instagram and Facebook can run several sentences, LinkedIn benefits from short one-line paragraphs, TikTok should be one punchy hook, and X must stay under 280 characters — the tool trims the X version automatically and shows the count.