The applied social science that studies individuals, groups and organizations and their activities related to the buying, use and disposal of goods and services is known as consumer behavior. It also focuses on studying the emotional, behavioral and mental responses that consumer's exhibit preceding the purchase of any goods and services. It aims to evaluate how attitudes, emotions and preferences influence consumer's buying behavior. It deals with all the different aspects of purchasing behavior ranging from pre-purchase to post-purchase activities. It studies characteristics of individuals such as demographics, loyalty, brand advocacy and willingness to provide referrals along with the influence of groups like family, friends and society on people's needs and wants. This is an interdisciplinary discipline and draws from other areas such as behavioral economics, sociology, anthropology, psychology and ethnography. This book explores all the important aspects of this field in the present day scenario. Different approaches, evaluations, methodologies and advanced studies on consumer behavior have been included in this book. This book will provide comprehensive knowledge to the readers.