Memory is a process of accumulation, storage and subsequent reproduction of past experience. From the standpoint of physiology, memory is the accumulation and strengthening of temporary connections in the brain. Memory allows you to resurrect (imagine) in the consciousness the images and events of the past, to reproduce phenomena that currently do not affect a person.
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.