"Shopping and buying" in the layman's perspective, "Purchasing" in the marketing parlance all means to give money for something we get. To be short, it is trade. Barter was one system those days to exchange goods against goods where no money and calculation came into action. For example a kg of rice was exchanged for a kg of wheat and so on. Those days have gone. Now it is all money. People started thinking big when they started earning more and more
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