Semiotics and structuralism revolutionized how we understand art and culture. These approaches view art as a system of signs, exploring how meaning is created and communicated through visual elements, cultural codes, and underlying structures. Key thinkers like Saussure, Peirce, and Barthes developed frameworks for analyzing signs, symbols, and their interpretations. These theories have been applied to various aspects of visual culture, from traditional art to advertising and digital media, shaping our understanding of communication and meaning-making.