What does the green light symbolize in The Great Gatsby?

In F. Scott Fitzgerald’s novel The Great Gatsby (1925) the green light at the end of Daisy Buchanan’s dock symbolizes Jay Gatsby’s unattainable dream and ambition. A self-made millionaire who pursued Daisy in their youth in Kentucky, Gatsby renews his love affair with her in New York despite her marriage to wealthy Chicagoan Tom Buchanan. The green light represents the future he strives for but never achieves, and there are similarities drawn between Gatsby’s quest, the hopes of early settlers in the New World, and the eternal pursuit of the American Dream.