This document provides a literature review on advertising synergy between television, print, and web media. It discusses how combining multiple communication channels can create greater persuasive effects than individual channels alone. The document reviews concepts of advertising synergy and repetition. It also maps the characteristics of television, print, and web advertising based on prior research, finding they each have strengths for different objectives. The literature suggests synergy across media leads to greater attention, cognitive processing, and more positive thoughts toward advertised products than repetition in a single medium.