It happens to me at least once a week to dream about dead people. Sometimes it’s family, some friends, personalities, or people I just don’t know. I can also been « searching » for people, and most of the time, I find them. They sometimes tell me things I can verify (I don’t know if it’s the right word) with living people.
I dream of people my husband knows and works with, and of events in the future. I once dreamt of a girl named ******** who had an affair with my ex-husband, and when I confronted him, he confirmed the name and her physical characteristics. Not always fun to have these dreams!
The nice things about it, is to have « good news » from the loved one, and to help people « passing » through the worlds/universes/steps of death. A friend of mine who had so much pain in her knees received me in her kitchen and told me that she has no more pain. She seemed very happy and at peace.
Maybe I’m completely crazy to believe they are really dead people, but I have these dreams since childhood and there is so many occurrences of verified facts…
I believe that you met your grandmother. Keep those precious moments in your 
.
Blessed be❤️