Giving her is a practice now almost unknown. The new generations are growing up without the habit of giving her to anyone. And it is a pity, because this form - which followed the older one of giving of you - is one more chance to bring with respect to one's interlocutor. Who knows, maybe even her death is a influence of the Anglo-Saxon language, where the distinction between "you" and "she / you" has long since lapsed to end in an indistinct "you".
It is true that the use of tu / lei varies a lot in the various Italian regions. In the South, even the new generations still have the good practice of giving her to strangers (it happens frequently to me on Instagram too), while in my part of Emilia-Romagna, where everyone feels a little friend of everyone, if given of her you will meet eyes wide with surprise. So let's see when it would be right to give her to one's interlocutor.
Giving her to an elderly person
One does not call her to an elderly person because in his day he used to do so. Indeed, if it really is elderly in his day he still used the you. It is called her because seniority deserves respect in all civilized cultures. As if to say: congratulations for making it this far.
To those who have some important role
It would be a good idea to also give her to anyone who at that moment holds a higher social role than ours. It would be right to give her office manager, to the mayor, to politicians in general (even if they should learn to deserve it), to the parish priest. In this case, giving of her emphasizes respect not so much for the person but for the institution that the person represents. That's why if a carabinieri patrol on the street stops you, it would be right from their of hers. Even if you get a fine.
To strangers
Now everyone is talking about you from the first moment they meet. In this way, any gradualness in acquaintance has been abolished and we all seem old friends. It may look nice but sometimes it's a fake facade. This is why it would be nice if we went back to giving her to those we do not know, waiting to win her trust until we can get to you.
And who do you still give her to?
