Ego is the second part of personality

Just like the id, the ego strives for pleasure, but realistically. Ego ensures to keep id in check and express it in socially acceptable ways. The ego may delay gratification, compromise, or anything else that will avoid the negative consequences of going against the norm.

Freud used the term ego to refer to one's sense of self. However, the word now refers to functions like judgment, regulation, and control.