The symbols (Greek symbolon = symbol and logos = study) is the branch of knowledge that studies the set of symbols and forms a part of semiology, the science of symbols in social life.

Symbol means to the image that is physically or verbally represents a moral or intellectual concept, distinguishing signs of the symbols. The first "mean", or images concerning a thing, while the symbols, besides meaning, "symbolize", ie transmit a message that the idea is symbolized by the symbol, a message that is their symbolism.

In the early stages of evolution, the human form of communication has developed in tandem with the symbols, helping with language development.

In this section shows some characteristics and meanings of symbols in heraldry, giving an interpretation to colors, shapes, forms and order within the shields, for a better understanding of the information embodied in the crests.