This document discusses the concept of consumer decision making and behaviour in the context of purchasing goods and services. It explores different models of decision making, factors that influence decision making, and how marketers respond to the decision making process. The document also compares and contrasts the differences between B2B and B2C decision making procedures and discusses the market research differences between the two. Additionally, it examines how personality, consumer perception, and self-motivation influence decision making and discusses the cognitive and behavioral approaches to consumer learning. The document concludes by evaluating how companies utilize an understanding of consumer behavior to influence decision making in both B2C and B2B contexts.