This document provides an introduction to representation theory. It defines key concepts related to representation including denotation, connotation, anchorage, codes, ideology, signs, signification, realism, suspension of disbelief, intertextuality, and enigma codes. Examples are given for many of these terms. The document suggests exploring how these various concepts are used in advertisements and media texts to construct meaning. It encourages analyzing the technical, verbal, and symbolic codes at play in a provided advertisement, as well as the signs, signification, degree of realism, and any intertextual references or enigma codes.