Definition
The broader field of AI focused on understanding and generating human language. LLMs are the current state of the art in NLP; older NLP techniques included rule-based and statistical methods.
Why it matters
NLP is the capability that lets software understand a customer's message the way it was actually written, including typos, slang, and half-formed questions, rather than forcing them through a rigid phone menu or keyword search. For a small business, this is what makes an AI receptionist or chat assistant feel like talking to a person instead of fighting a form. Where it still stumbles is genuinely ambiguous or emotional requests, which is why routing tricky conversations to a human remains part of a well-designed setup.