NLP (Natural Language Processing)
Natural language processing (NLP) is a subfield of AI concerned with how computers process, analyse and understand human language, from grammar checking through to recognising the topics of entire texts.
In practice
NLP now sits inside many everyday tools: search engines, translation services, voice assistants and the language models behind modern AI chatbots. What matters most for SEO and AEO is how reliably NLP systems recognise entities, relationships and the core statement of a text.