I have to admit to never hearing an italian use that Salve word???
Most will either use:
Ciao - for hello & goodbye
Arrivederci - goodbye
or
Buon Giorno - Good Morning
Buona Sera - Good Afternoon/Evening
Buona Notte - Goodnight
To be honest though, Ciao was always the most common! I've forgotten most of my basic italian now though, rusty through lack of use!!