---
title: "Template Variables"
description: "You can use Template Variables in your prompts for your Agent nodes, or when constructing the payload for the Webhook Node"
---

### Template Rendering
You can reference template variables which is passed as [`initial_context`](/core-concepts/context-and-variables#initial_context) either using the [API Trigger](/voice-agent/api-trigger) or when uploading a Sheet for a [campaign](/core-concepts/campaigns). You can also use any extracted variable as [`gathered_context`](/core-concepts/context-and-variables#gathered_context)

The template rendering can take nested values. 

Example: If the initial context is

```
{
    "initial_context": {
        "user": {
            "name": "John"
        }
    }
}
```

You can write your prompt to access the user's name as below

Prompt: `You are Alice, who is talking to {{initial_context.user.name}}.`

### Nodes
Dograh Voice Agents are composed of various nodes. These nodes can provide instructions to the voice agent, help you setup a [trigger](/voice-agent/api-trigger) where you can trigger the voice agent to call someone, or help you setup a [webhook](/voice-agent/webhook), where you can update the results of the call in your CRM or trigger a downstream workflow in n8n. In the next steps, we will be documenting the nodes that you can use in building the voice agent.