The document discusses key concepts in consumer and buyer behavior. It defines a customer as a person who buys goods and services and pays for them, while a consumer is the end user of those goods and services. It then explains factors that influence consumer behavior, including cultural, social, personal, and psychological factors. Specifically, it outlines how characteristics like age, income, lifestyle, personality, motivation, perception, learning, beliefs and attitudes all shape consumer decisions. Finally, it discusses the different roles in buying decisions, types of buying behavior, and stages of the consumer buying process.