In brief, NLP postulates that people have preferences for the sensory system they rely on to process information. Whether these preferences are genetic or learned is not important for our purposes here. When people have all their sensory systems in reasonably good working order, they use all three, and they can develop increased skill with each of them. Some people prefer the visual system. Some people prefer the auditory system.
Some people prefer the kinesthetic system.
They can also remember what they have seen better than they remember what they have heard. They learn best when they can see or make visual images of material. They are good listeners, and they are often good readers. Auditory learners learn best when they can use language to describe the material to be learned. For more information about the ways in which the senses of touch, taste, and smell work together to form the kinesthetic sensory modality see my philosophical observations.