What is shifting symbol?

A shifting symbol is a term used in literature and storytelling to refer to a symbol that changes its meaning or significance throughout the course of a story.

For example, in F. Scott Fitzgerald's novel "The Great Gatsby," the green light at the end of Daisy's dock initially represents Gatsby's longing for Daisy and his dream of winning her back, but by the end of the novel, it has come to represent the emptiness and futility of his pursuit.

Shifting symbols can provide insight into the development of characters and themes over time and can create a sense of depth and complexity in a story. They can also be used to illustrate the ambiguity and complexity of life and human experience.