Semiology seeks to understand how meaning is created through signs and sign systems. It examines how things like images, color, music and other media forms can take on meaning through social conventions rather than any inherent quality. Key thinkers who contributed to semiology include Saussure, Pierce, Barthes, and Eco. Semiology provides tools for analyzing how individual signs combine to create meaningful texts and how meanings are constructed, not found, in the interaction between signs and audiences.