God

A god is a superhuman being or spirit worshiped as having power over nature or human fortunes (also known as a deity). They are the central focus of a religion (a system of beliefs and teachings revolving around the belief in and worship of a superhuman being). In some accounts they are also the creator (or creators of the world and everything in it - in-universe in the case of some fictional universes).

In real-life there are various religions and (as of the the time this was written) the majority of the world's population are religious, and even some non-religious people believe in the existence of a god or gods. The most popular (and arguably the most credible) are the Abrahamic faiths Christianity Judaism and Islam.