What is demand? What is its essence?

Demand is the dependence of goods of a certain type that consumers are ready to purchase on the prices at which these goods can be offered to producers / sellers that have developed in the market over a certain period of time.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.