> For the complete documentation index, see [llms.txt](https://domainmappingsystem.gitbook.io/domainmappingsystem-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://domainmappingsystem.gitbook.io/domainmappingsystem-docs/features/query-string-parameters.md).

# Query String Parameters

{% hint style="success" %}
Query string parameters are supported by default in the free version of Domain Mapping System.
{% endhint %}

Query string parameters have a wide variety of use-cases and formats, such as this example:

```
https://your-mapped-domain.com/?[trackingparam]=[value]&...
```

You might use query string parameters for any of the following use-cases and many others:

* Google UTM parameters
* Affiliate plugins
* Prefilling form field data on a page

Query string parameters should not be confused with subdirectories or pages of your site, like this:

```
https://your-mapped-domain.com/landing-page/
```

{% hint style="warning" %}
You should see the data "pass-through" your mapped domain, so data will be tracked in your corresponding platform for the primary site domain. For instance, if you're using Google UTM parameters, you'll see the UTM tracking data in the Google Analytics Dashboard for your **primary domain** and not the **mapped domain.**
{% endhint %}

In the future, we hope to add support for query string parameters to mapped domains independently of the primary domain. If you need this feature, please [submit a ticket](https://domainmappingsystem.com/support/). 


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://domainmappingsystem.gitbook.io/domainmappingsystem-docs/features/query-string-parameters.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.