What is the designer God theory?

Could you please elaborate on the concept of the "designer God theory"? I'm curious to understand what it suggests about the origins and existence of the universe, as well as the role of a designer or creator in this theory. Are there any specific arguments or evidence that proponents of this theory often cite to support their beliefs? Additionally, how does this theory compare to other explanations for the existence and nature of the universe, such as naturalistic or scientific explanations?