A sign is a language universally accepted by people, such as the piece sign or even “the finger.” Other kinds of signs are mostly used to warn people, inform them, or manage their conduct, such as stop signs or any road sign you see.
A sign is mandatory to follow since it is communicating crucial information with the person. Signs can also tell you where you are or what is inside a building, such as a beauty parlor. On the other hand, a symbol is illustrative and stands for something recognized by groups of people or society.
It may be explained differently by people in different groups. For example, the cross is a symbol that has been universally accepted as the sacrifice Jesus made for us for the Christians. An example of a symbol could be letters standing for chemical elements or characters in musical notation.