What is NLP?

Neuro-linguistic Programming has been described in numerous different ways. From a theraputic point of view, it provides methodologies to enable a practictioner to change the way a client responds to various stimuli.

From a clients point of view, NLP is a way of solving numerous behavioral issues.

NLP could be the most important synthesis of knowledge about human communication to emerge since the sixties
Science Digest
NLP ... affords the opportunity to gain flexibility, creativity and greater freedom of action than most of us know how ...
Training and Development Journal

There are many articles on the web explaining what NLP is about. Here are a selection that I think may be helpful.

What is NLP? - Robert Dilts

What is NLP? - Pure NLP

What is NLP? - NLP.Com

NLP Presuppositions- Pure NLP