This document discusses theories of consumer needs and how advertisers appeal to those needs. It summarizes Maslow's hierarchy of needs and how advertisers seek to tap into consumers' physiological, safety, love, esteem, and self-actualization needs. It then outlines 15 common lines of appeal used in advertising, such as affiliation, nurturing, achievement, prominence, and escape. Finally, it analyzes persuasive techniques in advertising including humor, repetition, stereotypes, intertextual references, music, and signs conveyed through camera positioning, lighting, and image composition.