We use these energetic connections when we perform a magickal working, be it spell casting or healing or manifesting with The Law of Attraction. We manipulate the energy of these connections with our intention and emotion in order to make a change within the perceived reality. Within spell casting we manipulate the energy to align us with situations that would bring us money, or love, or that job we really desire. Within healing we manipulate the energy of the body or mind to bring about healing, or to bring the chakras in alignment allowing the life force or energy to flow freely and allowing for the individual to regain health and vitality. Within the act of manifestation we attract into our life experience the circumstances that would bring us wealth, health, or romance.
Communing with the other Realms and aligning with the entities that exist therein use these energetic connections. Casting Circles, working with divination, evocation, invocation, and many other practices within Wicca and Witchcraft use these connections. Mediums, psychics, magicians, alchemists, and many other spiritual individuals recognize and use these connections within their practices because it is how we interact with the Universe and deity.