God, from what I gather, represents any entity which makes the universe work. Often, God is also associated with creating the universe and everything in it. A majority of the people who believe in god, also believe that god has some control over their life and can make things happen if God so wishes. The idea of God is almost always coupled with the idea of afterlife. Often, people who believe in God also believe that their life right now is just a passage into the afterlife. This gives more meaning to their lives and makes them behave appropriately (try to commit less sins in order to get into heaven, for example). That is what I have in mind when I say God.
- Kevat Shah