Hierarchy of Needs was created by Abraham Maslow, which is the concept that the things humans need are incremental, and satisfaction of higher level needs is only achieved after those lower in the hierarchy are satisfied. 

At the base of the hierarchy is basic physical needs, such as food and shelter, up to self-actualisation at the top of the ‘pyramid’; this term refers to a set of human requirements which are important for the individual to achieve development; most organizations use it to make arrangements for any development course or opportunities for employees.