Sign Theory is a framework that explores how signs and symbols convey meaning. It examines the relationship between the signifier (the form of the sign) and the signified (the concept it represents). This theory is foundational in fields like semiotics, linguistics, and communication studies. One of the key figures in Sign Theory is Ferdinand de Saussure, who emphasized that meaning arises from the differences between signs rather than their inherent qualities. This perspective helps us understand how language and symbols function in society, influencing how we interpret messages and communicate with one another.