The Creator was the designation given to the one that created V'Ger.
"The Creator is that which created V'Ger."
"V'Ger is that which was created."
VGer came to Earth to find the creator, which was it expected to be another machine. However Admiral James T. Kirk discovered that VGer was actually the Voyager 6 probe, and that Humans were the creator. ''Star Trek the Motion Picture''