In the context of economic efficiency, what does the concept of marginal benefit refer to when making optimal choices?

Marginal benefit refers to the additional satisfaction or value that a person gains from consuming one more unit of a good or service. When making optimal choices, individuals compare the marginal benefit to the marginal cost, which is what they have to give up to get that extra unit. For example, if you are deciding whether to buy a second slice of pizza, the marginal benefit would be the enjoyment you get from that slice compared to the cost of buying it. If the enjoyment is greater than the cost, it makes sense to buy it, but if not, you might choose to save your money. This concept helps people make decisions that maximize their happiness and resources.