> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tavus.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> Use Tavus tools and guides to build PALs with real-time human-like perception and presence, bringing the human layer to AI.

<Frame>
  <img src="https://mintcdn.com/tavus/6mGnBiGSIfaW2w6g/images/tavus_cvi_pipeline_with_photos.png?fit=max&auto=format&n=6mGnBiGSIfaW2w6g&q=85&s=423b8592af39d8cd14c371acc42d520a" alt="" width="1548" height="598" data-path="images/tavus_cvi_pipeline_with_photos.png" />
</Frame>

Tavus uses the **Conversational Video Interface (CVI)** as its end-to-end pipeline to bring the human layer to AI. A **PAL** is what you build in CVI. Configure its **Face** to define how it looks, its **Voice** to define how it sounds, and its behavior, knowledge, objectives, guardrails, tools, and pipeline layers to shape how it thinks and acts.

<Note>
  **Terminology update:** Tavus now uses **PAL** for what you build, **Face** for how it looks, and **Voice** for how it sounds in the API and docs. Legacy names **persona** and **replica** still work on existing endpoints and request fields (`/v2/personas`, `/v2/replicas`, `persona_id`, `replica_id`, and related aliases) for backward compatibility.
</Note>

## Developer Guides

Follow our in-depth technical resources to help you build, customize, and integrate with Tavus:

<CardGroup cols={3}>
  <Card title="Conversational Video Interface" icon="messages" href="/sections/conversational-video-interface/overview-cvi">
    Learn how Tavus turns AI into conversational video.
  </Card>

  <Card title="What Is a PAL?" icon="user-gear" href="/sections/conversational-video-interface/pal/what-is-a-pal">
    Configure how your PAL thinks and acts.
  </Card>

  <Card title="Face" icon="user-group" href="/sections/faces/overview">
    Build a hyper-realistic face using Phoenix.
  </Card>
</CardGroup>

## Conversational Use Cases

<CardGroup cols={2}>
  <Card title="Sales Development Rep" href="/sections/conversational-video-interface/conversation/usecases/sales-development-representative" img="https://mintcdn.com/tavus/n1GjuWL0lBZS5HZU/images/anna.png?fit=max&auto=format&n=n1GjuWL0lBZS5HZU&q=85&s=d8778303c10a8aeac45e0f997492d402" width="1920" height="1080" data-path="images/anna.png">
    Engage with Anna, the Tavus sales development rep.
  </Card>

  <Card title="Interviewer" href="/sections/conversational-video-interface/conversation/usecases/ai-interviewer" img="https://mintcdn.com/tavus/jW75mHdKfk2Vdngl/images/lucas.png?fit=max&auto=format&n=jW75mHdKfk2Vdngl&q=85&s=204729bca92b88c82799f6a825c5b1a7" width="1920" height="1080" data-path="images/lucas.png">
    Screen candidates at scale with an engaging experience.
  </Card>

  <Card title="Customer Support" href="/sections/conversational-video-interface/conversation/usecases/customer-service" img="https://mintcdn.com/tavus/n1GjuWL0lBZS5HZU/images/gloria2.png?fit=max&auto=format&n=n1GjuWL0lBZS5HZU&q=85&s=686824dd8a8494db70e8d51d015127cb" width="1920" height="1080" data-path="images/gloria2.png">
    Support users with product issues.
  </Card>

  <Card title="Medical Intake" href="/sections/conversational-video-interface/conversation/usecases/medical-intake" img="https://mintcdn.com/tavus/FtMLw0c37mspVhO2/images/ruby.png?fit=max&auto=format&n=FtMLw0c37mspVhO2&q=85&s=370f5a25d770554d0bf19a7ee0713f61" width="1920" height="1080" data-path="images/ruby.png">
    Run a structured pre-visit intake flow.
  </Card>
</CardGroup>


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