Why is symbolism used in art?

Symbolism is to convey the hidden meaning to the reader or listener. It tells us about artistic expression and represents abstract ideas.

Is feel an abstract noun? Is Pain concrete or abstract noun? How do you develop abstract thinking? Is abstract art dead? Who came up with abstract art? What are abstract landscape photographs? What does abstract drawing mean? How do I know if I am an abstract thinker? Who was Robert Delaunay influenced by? What is art in the metaphysical sense?