Goods and needs: All human beings feel the need to satisfy various economic needs every day. These needs are called needs. Needs can be classified as primary or secondary, individual or collective. Eating is a good of primary importance for our body to function well, just like the need to cover ourselves to protect ourselves from the cold. Reading, on the other hand, is a secondary need because even if it is very pleasant, drinking a hot drink is not essential for our life. It is an individual need because it satisfies the needs of a single person. The need for security, on the other hand, is a collective need felt by several people who are part of a community. The needs that humans feel have common characteristics. They are subjective because they change from person to person. They are variable because they change with the passage of time. They are unlimited because they increase in relation to the level of development of society. They are satiated because they can be satisfied but they are also resurgent because once satisfied they appear again. Individuals satisfy their economic needs through goods, material things or services offered by private individuals or the state. Not everything that exists in nature can be considered a good from an economic point of view. In fact, the goods that affect the economy have Three characteristics are useful, that is, they are able to satisfy a need; I have a desire; food satisfies the need for nourishment; a plane ticket satisfies the desire to travel; they are accessible, that is, it must be possible to use them with the technological possibilities currently available to human beings; they are available in limited quantities to be exchanged; however abundant a good, such as water, is; if it is not unlimited, it is an economic good. Economic goods can be classified according to different criteria. We can distinguish goods according to their destination: consumer goods when they are used to directly satisfy a need; capital goods when they are used to produce other goods; according to their duration. Goods can be distinguished: durable goods when they can be used multiple times to satisfy a need; non- durable goods when they are used up after having satisfied a specific need of ours only once. If we consider goods according to the ways in which they are used, we can distinguish them: complementary goods, that is, goods that we use simultaneously to satisfy our need; substitute goods when they can be used as an alternative to a similar good, for example, we can drink coffee or tea.