A part of our minds and thoughts we are not conscious of until we think about them. Our subconscious mind influences our thoughts, emotions, and behaviors. Transfer of a learned process can go from conscious to subconscious thought as the rote behaviors are assimilated, such as the skills used when playing a musical instrument or driving a car.
But implicit biases are also part of the subconscious mind, behaviors learned and modeled to children, and those behaviors and emotions also affect our conscious behaviors