Jay Gatsby is the enigmatic protagonist of F. Scott Fitzgerald's novel 'The Great Gatsby.' Set in the Roaring Twenties, the story explores themes of wealth, love, and the American Dream. Gatsby is a self-made millionaire who throws extravagant parties in the hope of winning back his lost love, Daisy Buchanan. He is known for his mysterious past, his obsession with wealth, and his tragic fate. Gatsby's character represents the illusion of the American Dream and the emptiness that can lie beneath the pursuit of material success.