Sigmund Freud studied how unconscious motives and conflicts determine human behavior, feelings, and thoughts. He lived in the Victorian era where high morals and modesty were taken seriously. Children were not allowed to be loud and did not spend much time with their parents. A lady did not where a dress that would show her ankles. During this time there were extremely strict codes of conduct.
Freud's importance: through initiating his beliefs about neurological behavior and the Second Mind (conscious and unconscious), Freud had created the ID and the superego. The ID is the playful and fun part of the brain that has an impatient state of mind that strongly relies on instinct. The superego is the part of the brain that focuses on right and wrong. The superego is not always conscious, but it typically cares about opinion. These are all areas that have an importance to being psychoanalytic, which is the theory of personality organization and the dynamics of personality development. Because this was based in the Victorian Era, there's things typically weren't talked about. After all, this was a time of high morals and modesty so most people though Freud was crazy for his theories. However, Freud did not let that break his spirit and he continued to create new ideas regarding psychology.