What is up with Don Vito's jaw in The Godfather?

In "The Godfather," Don Vito Corleone, played by Marlon Brando, has a distinctive jaw appearance due to the actor's use of a prosthetic device. Brando stuffed his cheeks with cotton to create a fuller, more imposing look, which contributed to the character's gravitas and authority. This choice added to the iconic nature of the character, making Don Vito memorable in both appearance and presence. The prosthetic also symbolized the character's struggle with power and vulnerability.