This document defines key terms used in political advertising and media. It discusses testimonials, endorsements, mudslinging, bandwagons, media bias, negative advertising, and issue advertising. Negative advertising can backfire and cause voters to view the sponsoring candidate negatively. The use of negative ads has increased over time, while challengers tend to use them more than incumbents. Issue advertising focuses on changing opinions on topics rather than selling products, and has also risen since the 1950s.