Self-actualization is one of the needs in Maslow's hierarchy of needs.   It is important to define self-actualization.   What is self-actualization?  

Self-actualization Definition:

Self-actualization reflects personal growth in which we achieve our true potential. 

Self-actualization Example:

A person may realize that he or she has the ability to write and decides to write a novel.  The decision to write the novel can be viewed as reflecting the need for self-actualization.