Self-actualization needs are the highest level in Maslow's hierarchy, and refer to the realization of a person's potential, self-fulfillment, seeking personal growth and peak experiences. Maslow (1943) describes this level as the desire to accomplish everything that one can, to become the most that one can be. That being the case, self-fulfillment is not terribly different from self-actualization. Maslow probably chose the term because it would be perceived as more technical.
However, self-actualization according to Maslow's hierarchy is dependent on one’s maximum realization and fulfillment of their potential in life, their talents, and their abilities. Those who can reach self-actualization are therefore content, often good at problem solving, and referred to in this sense as creative.