A customer is one who purchases products for usage rather than for resale or commercial purposes. The customer is a person who pays a certain quantity of cash for the products and services needed to be consumed. Consumers therefore play a crucial role in a nation's economic system. The customer is also one of the components of the supply chain. Marketers have recently began to participate in personalized marketing, permit advertising and mass customization instead of marketers producing wide demographic profiles and Fisio-graphic profiles of market segments. Buying pattern has been changed generations after generations; first of all it started as a barter system, people exchanged goods with goods. Then during 600 BC coins came into existence and they started to trade with it. Later on during the 700 BC currency came into existence and slowly trading with currency was easier. And during the 21st century online banking came into progress which made transactions and trading much easier. This online banking was made convenient to common people and retailers too. They sell their products through online websites and reach the consumers easily. Most people all over the world prefer online shopping and online transactions. And anyone can contact with any one for trading. The consumers also get many choices to select whatever they want. Buying patterns show how consumers buy services or goods but are heavily capable of changing. Marketers often attempt to comprehend the pattern of purchasing and its relationship with the consumer's geographic, demographic and psychological features. Marketers perform extensive surveys to know the purchasing trends.