What is the principle of marginal utility in the context of consumer utility maximization?

The principle of marginal utility is about how consumers make choices to get the most satisfaction from their money. Marginal utility refers to the extra satisfaction or benefit a person gets from consuming one more unit of a good or service. When consumers spend their money, they aim to maximize their total satisfaction by comparing the marginal utility of each option. For example, if you are hungry and eat a slice of pizza, the first slice gives you a lot of satisfaction, but the second slice might give you less satisfaction than the first. Consumers will keep buying until the marginal utility of the last item they purchase equals the price they pay, ensuring they get the best value for their money.