Learning involves acquiring or modifying knowledge, behaviors, skills, or preferences through experience. It can occur consciously or unconsciously and results in relatively permanent changes. Key factors that influence learning include intellectual, environmental, physical, emotional, media, and relationship factors. There are different types of learning including remembering, understanding, applying, analyzing, evaluating, and creating. The four pillars of learning are learning to know, learning to do, learning to live together, and learning to be. Transfer of learning occurs when learning in one situation impacts performance in another situation, which can be positive, negative, or neutral.