For me...?
Most simply put, God is energy. Decades ago, Albert Einstein proved that everything is energy. All that we know to be matter is, in fact, rapidly moving particles of energy. This concept is hard for our minds to fathom since we experience it as substance. In this third dimensional reality, God has created a very slow vibration in order that this energy "take form". Because of this, we can interactively experience the things we create. Touch them, hold them, hear them, see, smell, and taste them. So every single thing we see, feel, and know is energy. It simply vibrates more slowly or more quickly depending on what it is. Just as a hummingbird's wings become invisible as she flies, but visible again when she alights, so are many things in our world invisible yet "visible". Light and shadow, for instance. Air and wind. Color. Thoughts and ideas. Feelings are also a vibration we can feel, but rarely see.
What is GOD for you?