What exactly is the subconscious mind?

Because there is a limit to the amount of information that can be held in our conscious awareness, as it would be an information overload, a storehouse for one’s knowledge and prior experience is needed; this is the subconscious.
The subconscious mind is a combination of everything one sees, hears and any other information the mind collects that it can’t consciously process or make sense of. The conscious mind can’t always process disorganised information, as it would go into information overload. Therefore, the subconscious mind stores the information where it can be retrieved by the conscious mind when it needs to.
The subconscious mind stores this information even though the conscious mind may not have processed or achieved complete understanding. It stores the information for later recall when “recalled” by the conscious mind, or by a perceptive hypnotherapist who can draw out the knowledge stored in the subconscious, bringing it into the individual’s conscious awareness.