Do you know "Symbolization"?

I don’t know “Symbolization” exactly.
Could you explained with examples? especially any movies and novels.

I recently studied “The Metamorphosis” by Franz Kafka.
So, I want to understand “Symbolization” exactly with other examples~!

Gulliver’s Travels…J.Swift
Animal Farm…G. Orwell
Brave New World…A. Huxley
Lord Of The Flies…W. Golding
Alice In Wonderland…L.Carroll

I want to know specific details.

For example, Napoleon, in Animal Farm, means dictator in real society. Right?

May I suggest reading the annotated versions of one or more of the above books for a very specific understanding.