Tweetable means short and sharp enough to be posted as a tweet, and good enough that someone would want to. It carries two ideas at once: it fits (a tweet had a hard limit — 140 characters at first, later 280), and it lands (it is quotable, funny, or striking). So when someone says a line in a speech was 'very tweetable', they mean it was neat, memorable, and made to be passed around. It is used most in writing about media, politics and marketing, often a little critically — calling a politician's message tweetable can hint that it is snappy but shallow, made for sharing rather than for thinking about. There is a complication you should know: the site called Twitter was renamed X in 2023, and the official word for a post there is now a post, not a tweet. But people kept saying tweet in speech, and 'tweetable' has drifted free of the site anyway — it now often just means 'short and quotable'. It is an adjective: a tweetable line, a tweetable moment, that quote is very tweetable.

適合發推的、一句話就能轉發的（短又有記憶點）