These three words are used to let customers know that items are being discounted. Here in Italy, sales are regulated by regional law. Everything goes on sale at the same time, twice a year, in February ... and right now! Starting this Saturday, July 3, "saldi" signs appeared in most shop windows.
The English word SALE is also the Italian word for SALT.
This Diesel Store window on the Via del Corso in the center of Rome plays with both of these words!