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In economics, a consumer is an individual or organization that buys goods and services for personal use, rather than for resale or further production. Consumers are central to economic activity, as their demand drives markets.1

Consumer theory, a branch of microeconomics, studies how consumers make decisions to maximize their satisfaction, or "utility," within their budget constraints. This involves understanding their preferences, needs, and how factors like culture, social influences, and personal circumstances shape their purchasing behavior.23

The concept of consumerism in economics posits that consumer spending is a primary driver of economic growth. However, it also acknowledges potential downsides, such as excessive materialism and environmental impact. Consumption itself is the use of goods and services, which is distinct from the expenditure made to purchase them, especially for durable goods that provide services over time.45

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