Value generally refers to the positive significance and usefulness of the object to the subject. It can be considered as the total amount that can fairly and properly reflect the equivalent value of goods, services or money.

In economics, value is an important attribute of a commodity, which represents how many other commodities the commodity can be exchanged for. Value is usually measured by money and becomes price. The value in this view is actually the expression of exchange value.

On the other hand, classical economics thinks that value and price are different. According to Marxist political economy, value is undifferentiated human labor condensed in commodities, that is, commodity value. Marx also divided value into use value (value given to commodity buyers) and exchange value (exchange volume of use value).

The essence of economic value is the role of human labor in the development of human economic products and relations. Including creating the use value of products and creating the labor value of production relations.

The concept of value in Das Kapital refers to exchange value, that is, the essence under the capital relationship. The general value form cannot be replaced by the value of local category, and the general value form is not equal to the local value form. The practice of value must be determined within a certain scope.

According to Marx's political economy, "value" is undifferentiated human labor condensed in commodities, that is, product value.