Neuro-Linguistic Programming (NLP) is a model that describes the connection between neurology, language, and programming. It involves techniques to reprogram thought and behavior patterns through language and sensory experiences. The key techniques discussed in the document include dissociation, cognitive reframing, anchoring, rapport building, priming, swish, mirroring, modeling, and the meta model. NLP aims to achieve behavioral change through understanding unconscious beliefs and modifying linguistic and sensory representations.