Are tips or gratuities included in your prices?

No, Tips in Italy are not mandatory, but it’s customary to give them in proportion to the quality of the service received.
It’s not a fixed percentage as it is in many countries such as in the US, we could say it’s proportional to how much the service fulfils or exceeds the expectations.
So it’s not given in case of a mediocre service, it’s minimal in case of average and rises from there in a proportion the client decides. It is actually embarrassing to be asked how much tip is owed.