It is defined as a feeling of deprivation with respect to a general satisfaction, linked to basic human needs, this definition covers the notion of generic need.
When a certain level of lack is reached, that is, when it becomes very intense, it becomes a need.
As we have mentioned before, the need is the concept that underlies the idea of Marketing.
Marketing acts on needs by creating products to satisfy them, therefore, it must be aware of the market to detect new needs that may arise.