Your unconscious mind processes information faster than your conscious mind.
The dual process theory states that we think about things unconsciously and consciously. Unconsciously, we take in a lot of information and automatically process them without much effort into thinking. For example, we may unconsciously process what’s in the surrounding while we are paying attention to our computer screens. We may consciously not be aware of what’s going on in the background, but our unconscious mind has already taken in that information.
While with conscious or controlled thinking, we put in actual efforts to understand what we are observing. For example, you read this and you try to understand it. That is conscious thinking.
It is suggested that most of our thinking is unconscious, because they are outside our awareness. There are too much information and distracting information in the environment for us to take it all in at the same time. So we need our unconscious mind to make sense of them for us. This unconscious process also takes place when we sleep and are trying to make sense of the things we didn’t really notice in the day.