# Why Set Up an ai.yourdomain.com Subdomain?

> Canonical source: [Why Set Up an ai.yourdomain.com Subdomain?](https://www.answer.cloud/pages/why-set-up-an-ai-yourdomain-com-subdomain-hosted/)

An AI companion subdomain is an optional publishing architecture for an existing website, not a universal requirement.

An ai subdomain can provide a separate home for an AI companion’s published content while your original website remains on its existing host. It is one architecture choice, not a requirement for AI discovery.

## When a companion is useful

Use it when you want editable answer resources and on-site chat without moving the full original website. Keep shared facts consistent, provide clear navigation, and plan canonical URLs and duplicate-content handling deliberately. A subdomain does not automatically eliminate SEO risks or guarantee a mention in an AI answer.

## When a hosted website is simpler

If answer.cloud will host the complete website, use the full Astro workflow. You do not need an extra ai subdomain merely to publish useful content or generated discovery resources.

## Set up the chosen target

Follow the [existing-site guide](https://www.answer.cloud/docs/mcp-existing-sites-hosted/) or [hosted-site guide](https://www.answer.cloud/docs/mcp-hosted-sites-hosted/). Use the domain records returned for your actual site and verify HTTPS and routing before relying on the address.

Explore [answer.cloud](https://www.answer.cloud/) and the [setup guide](https://www.answer.cloud/pages/how-to-set-up-your-answer-cloud-answer-engine-hosted/).