A realm is a planetary domain that exists on levels of dimensions. Because our soul is not limited, and is limitless, it can travel to these other realms to explore, learn, and educate. Our souls, I feel, can do this at night when we are astral traveling, or because of parallel universes, they exist in these realms then pass the information onto us here. They do this because we are existing in human form, but are here to help elevate the level of consciousness of other humans on earth.