Signs can take many forms and convey multiple meanings. They are composed of two parts: the signifier, or physical representation, and the signified, the conceptual meaning. Signs have both denotative and connotative meanings that can vary based on interpretation. There are three main types of signs: iconic signs closely resemble what they represent, indexical signs indicate a concept through association rather than direct representation, and symbolic signs rely on learned cultural or social meanings rather than physical likeness. Interpretation of signs depends on context and the experiences of the interpreter.