Ciao is interesting............don't use it in formal speaking or even with folks you don't know.Yes, but only by those certificated to do so.
Re vavavroom's post #102: "Bye" in Italian is spelled CIAO (pronounced 'chow').
Re post #133: I have always thought some sense of propriety made people say ashphalt because asphalt has the word A$$ in it.
We haven't gone to the LIBERRY in this thread.
https://dailyitalianwords.com/how-to-say-goodbye-in-italian-arrivederci/