> For the complete documentation index, see [llms.txt](https://docs.pletor.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pletor.ai/get-started/key-concepts.md).

# Key concepts

Before diving deeper into Pletor, let's clarify the foundational concepts that power everything you'll build.

### Agents

**Agents are reusable creative systems**. They are designed to handle specific marketing tasks. 

You can use Agents to ideate and experiment freely with AI or as a scalable recipe. Once you've perfected the formula (the right models, brand context, etc.), it becomes a repeatable system that removes all production constraints.

<figure><img src="/files/tk0tyE1F7Fkp1l8PA6Io" alt="" width="563"><figcaption><p>A few agents built by the Pletor team</p></figcaption></figure>

### Studio

**The Studio is where the magic happens and Agents get built.**

Here you can experiment with different nodes, test various AI models, and refine your workflow until it consistently delivers the results you want.

<figure><img src="/files/t4UJlJhi1FDdTVIaw4Sf" alt="" width="563"><figcaption><p>A (very) simple agent in the Studio</p></figcaption></figure>

### Nodes

**Nodes are LEGO blocks for Agents.** Each node performs one specific function: collecting user input or brand context, generating an image or a video, etc.

Connect nodes together, and you've built an agent. No coding required. Just drag, drop, and connect.

<figure><img src="/files/ACA4TJUA5UCVqTQwZxmH" alt="" width="563"><figcaption><p>Common nodes and models</p></figcaption></figure>

### Models

**Models are the AI engines under the hood.** When a node needs to generate an image, write copy, or create a video, it uses an AI model to do the heavy lifting.

Different models excel at different things, see AI model library section.

<figure><img src="/files/6FoSS4RJCCSqk9lRjNOd" alt="" width="375"><figcaption><p>A few model providers available on Pletor</p></figcaption></figure>

**Ready to see these concepts in action?** Head to the [Studio](broken://pages/g1uXQ3dp6DlnKTLOKjvf) to start building your first custom agent, or explore our [template agents](/build-agents/templates.md) to see what's possible.