# What is Large Language Model (LLM)? | Yungle glossary

> An LLM is the type of AI model, like GPT or Gemini, that powers modern AI search and chat answers.

Source: https://yungle.ai/glossary/large-language-model-llm/

1.  [Resources](https://yungle.ai/resources)
2.  Glossary

Glossary · L

# Large Language Model

In plain words

A large language model (LLM) is an AI system trained on massive amounts of text to understand and generate human language. LLMs power tools like ChatGPT, Gemini, and Google's AI Overviews, and optimizing content for how these models parse and cite information is the core discipline behind AEO and GEO.

Example

When a buyer asks Claude or ChatGPT to compare website partners, an LLM writes the answer from what it learned and from the pages it can retrieve.

Related resources

-   Glossary

    ## Natural Language Processing

    NLP is the branch of AI that lets computers understand, interpret, and generate human language.

    [See term](https://yungle.ai/glossary/natural-language-processing-nlp)
-   Glossary

    ## Generative Engine Optimization

    GEO is SEO built for generative AI models, positioning a brand to be recommended by tools like ChatGPT or Gemini.

    [See term](https://yungle.ai/glossary/geo-generative-engine-optimization)
-   FAQ

    ## What Is MCP (Model Context Protocol)?

    MCP (Model Context Protocol) is an open standard that lets AI models connect securely to external tools, databases, and business systems in a consistent way, instead of requiring custom integration code for every single connection. It's part of the infrastructure that makes reliable AI agents possible — allowing an AI to safely read your calendar, update your CRM, or search your files without a one-off integration built from scratch each time. It's becoming a common building block behind modern AI development.

    [See answer](https://yungle.ai/resources?type=faq#what-is-mcp-model-context-protocol)
-   FAQ

    ## How Do I Optimize My Website for AI Search Engines Like ChatGPT?

    Write clear, self-contained answers to specific questions using structured formatting like headers and lists, build genuine topical authority around your subject area, and make sure your content is easy for AI crawlers to access and parse technically. AI tools like ChatGPT and Perplexity favor content that directly answers a question without requiring the reader to piece it together from a long article. This is the core of AEO, and it overlaps heavily with good traditional SEO practice.

    [See answer](https://yungle.ai/resources?type=faq#how-do-i-optimize-my-website-for-ai-search-engines-like-chatgpt)
-   Insight

    ## In-House Web Developer vs. Web Studio Cost

    How to compare the real cost of hiring an in-house web developer with working with a web design and development studio, beyond salary.

    [Read insight](https://yungle.ai/insights/in-house-developer-vs-web-studio-cost)

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